I liked this grid with words all the way round the border, it is a long while since I saw one of these. Good to have the minimum of black space on the grid, value for money!
There are a couple of clues where I don’t quite get the wording, even though I’m sure I have the correct answer. Thanks to Hypnos for an enjoyable Sunday solve.

| Across | ||
| 1 | GILLIAN ANDERSON | 
 Actress is landing a role that alters end of western (7,8) 
(IS LANDING A ROLE)* anagram=that alters then westerN (end of) – aka Special Agent Danna Scully 
 | 
| 9 | VANCOUVER | 
 Advantage with college mostly open for French speakers in Canadian city (9) 
VAN (advantage, tennis) with C (college) OUVERt (open in French, mostly) 
 | 
| 10 | PRISM | 
 Gentleman held back during afternoon source of colourful viewing? (5) 
SIR (gentleman) reversed (held back) in PM (afternoon) 
 | 
| 11 | RASTA | 
 A celebrity cycling is religious follower (5) 
A STAR (celebrity) with letters cycled one place (so back letter moves to the front) 
 | 
| 12 | CLAMOROUS | 
 Noisy pair of clerics disrupting room in Australia (9) 
CLerics (pair of letters from) ROOM* anagram=dirupting in AUS (Australia) 
 | 
| 13 | OLIVER | 
 One taking pride in food right to back fruit (6) 
R (right) behind (to back) OLIVE (fruit) – Jamie Oliver? 
 | 
| 14 | ALOE VERA | 
 Drug kept by a boyfriend, say, with a cosmetic preparation (4,4) 
E (drug) inside (kept by) A LOVER (boyfriend say) with A 
 | 
| 17 | GREAT TOE | 
 Digit at top end of the scale? (5,3) 
why?  I know a toe is a digit but there must be more than this. 
 | 
| 19 | STUDIO | 
 Boss I love in film company (6) 
STUD (boss) I O (love) 
 | 
| 22 | NUT BUTTER | 
 Foreign character with illness, say, that’s spread (3,6) 
NU (Greek letter, foreign character) with TB (illness) than UTTER (say) 
 | 
| 24 | ERATO | 
 Artistic inspiration embodied by singer at opera (5) 
found in (embodied by) singER AT Opera 
 | 
| 25 | ROUND | 
 Get applause in golf (5) 
double definition?  One can have a round of applause and a round of golf, but I can’t quite explain the wording of the clue. 
 | 
| 26 | GALLIPOLI | 
 I see plunder largely reflected in battle site (9) 
I LO (see) PILLAGe (plunder, largely) all reversed (reflected) 
 | 
| 27 | LIBERAL DEMOCRAT | 
 Cable, say, displaced or trim lead with cable? (7,8) 
anagram (displaced) of OR TRIM LEAD with CABLE – Vince Cable 
 | 
| Down | ||
| 1 | GOVERNOR GENERAL | 
 A long green Rover transported Commonwealth official (8,7) 
(A LONG GREEN ROVER)* anagram=transported 
 | 
| 2 | LANDSLIDE | 
 Shifting of ground in overwhelming electoral victory (9) 
double definition 
 | 
| 3 | ISOLATE | 
 Campbell, perhaps, wearing a tie that’s frayed and cut off (7) 
SOL (Sol Campbell perhaps, footballer) inside (wearing) (A TIE)* anagram=that’s frayed 
 | 
| 4 | NOVICE | 
 Rookie without a deputy? (6) 
NO VICE (without a deputy) 
 | 
| 5 | NORMALLY | 
 Wisdom, maybe, shown by friend in standard fashion (8) 
NORM (Norman Wisdom, maybe) then (shown by) ALLY (friend) 
 | 
| 6 | EXPLORE | 
 Investigate former place with product of mine (7) 
EX (former) PL (place) with ORE (product of mine) 
 | 
| 7 | SLIGO | 
 Southern language, not northern, found in county (5) 
S (southern) LInGO (language) missing N (northern) 
 | 
| 8 | NUMISMATOLOGIST | 
 One whose expertise has developed in bits? (15) 
cryptic definition – bits are coins 
 | 
| 15 | ENDEAVOUR | 
 Effort shown in some bowls continually, we’re told (9) 
END (some bowls, a game of bowls) EAVOUR sounds lime (we are told) “ever” (continually) 
 | 
| 16 | PORTUGAL | 
 Country drink attracting posh woman (8) 
PORT (drink) with (attracting) U (posh) GAL (woman) 
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| 18 | THUNDER | 
 Rail times hopelessly at first below par (7) 
Times Hopelessly (first letters of)  UNDER (below par, golf) 
 | 
| 20 | TREVINO | 
 Old golfer from Italian city switching direction (7) 
TREVIsO (Italian city) with N (north) repacing S (south, direction) – Lee Trevino 
 | 
| 21 | GRILSE | 
 Young fish in Greek isle cooked (6) 
GR (Greek) than ISLE* anagram=cooked 
 | 
| 23 | THUMB | 
 Indicate need for lift in Northumberland (5) 
found in norTHUMBerland 
 | 
*anagram
definitions are underlined
		definitions are underlined
Argh! I totally failed to get 13ac last week, and now I see it was because I’d managed to misspell 1dn, with an ‘e’ instead of an ‘o’. And once I think I’ve solved a clue, I don’t go back and check.
I couldn’t parse 22ac, so thanks for the explanation. I can’t see what 17ac is getting at, either.
Thanks, PeeDee. I enjoyed this, as I usually do with Hypnos.
GILLIAN ANDERSON is indeed best known for playing Dana Scully, but she’s recently done some acclaimed stuff on stage too.
I took GREAT TOE to be the fact that our big toe is, well, the biggest – so ‘at the top end of the scale’. Not perhaps the best clue in the puzzle, unless we’re all missing something.
FWIW when I were nobbut a lad, in our house it was always called your ‘great toe’, so the clue is perfectly straightforward.
Just my $0.02 worth.
If you stand on a scale to weigh yourself, your big toe will be at the top. Unless, of course, you stand on your hands.
Hi Conrad – ‘perfectly straightforward’ was what was bothering me – it seemed too straightforward to be in this puzzle. I like Quaiteaux’s idea – I could not say of it is correct or not but it is cyptic.