A slightly tougher than normal Tuesday offering, I thought, with some head-scratching multi-parters…
… and a very nice &lit. Finished on the left only when all crossers were in. Good test, thanks to Gurney.

| Across | ||
| 1 | DOWNSTAIRS | Far from happy, famous person’s going round one part of building (10) |
| DOWN (‘far from happy’) + STAR’S around 1. | ||
| 6 | EDEN | Former PM’s eastern retreat (4) |
| E[astern] + DEN (‘retreat’). | ||
| 9 | TOPICALITY | Current relevance of oil city apt to be misrepresented (10) |
| Anagram (‘to be misrepresented’) of OIL CITY APT. | ||
| 10 | USER | Serious error imprisoning addict (4) |
| Inclusion in ‘serioU SERror’. | ||
| 12 | PRESS RELEASE | Urgency about rental agreement? Information here (5,7) |
| PRESS (‘urgency’) RE (‘about’) LEASE. | ||
| 15 | ABOUT-FACE | Change of mind in relation to notes (5-4) |
| ABOUT (‘in relation to’) + F,A,C,E, the notes in the spaces on the treble clef. | ||
| 17 | STASH | Time to enter band’s store (5) |
| SASH (‘band’) includes T[ime]. | ||
| 18 | SITAR | Instrument is returned to sailor (5) |
| IS reversed + TAR. | ||
| 19 | MUSKETEER | Old soldier, one thinking about Koestler regularly (9) |
| MUSER includes alternate letters of ‘KoEsTlEr’. | ||
| 20 | RINGSIDE SEAT | Good view here of dial division with water temperature (8,4) |
| RING (‘dial’) + SIDE (‘division’) + SEA + T[emperature]. | ||
| 24 | CONE | Bollard, not exactly unique (4) |
| C[irca] (=’about’, ‘not exactly’) + ONE (‘unique’). ‘Cone’ as in temporary traffic ‘bollard’. | ||
| 25 | PLEASANTRY | Land worker, about fifty, by railway making remark (10) |
| PEASANT (‘land worker’) around L (Roman 50) + R[ailwa]Y. | ||
| 26 | TART | Cutting tact with introduction of rocket for Charlie (4) |
| TAcT, its C[harlie] replaced by 1st letter of ‘Rocket’. | ||
| 27 | LOVE LETTER | Missive to sweetheart with zero character? (4,6) |
| LOVE (‘zero’) + LETTER (‘character’). | ||
| Down | ||
| 1 | DATE | Fruit of romantic appointment? (4) |
| Double definition. | ||
| 2 | WIPE | Towel, say, from Women’s Institute? Extremely probable (4) |
| W[omen’s] I[nstitute] + ends of ‘ProbablE’. I have a soft spot for the W.I., having won an electric bike in their magazine’s cryptic crossword competition. | ||
| 3 | SECURITY RISK | Crisis with Turkey potentially source of danger (8,4) |
| Anagram (‘potentially’) of CRISIS + TURKEY. | ||
| 4 | ATLAS | Expression of regret about ultimately deficient book (5) |
| ALAS around end of ‘deficienT’. | ||
| 5 | RETURNEES | Re-enter US after moving? They might (9) |
| Anagram of RE ENTER US &lit. | ||
| 7 | DISPARAGER | Somehow drag praise out of him? Quite the opposite (10) |
| Anagram (‘somehow’) of DRAG PRAISE, w whole clue def (not quite an &lit this time, I think, but still neat). | ||
| 8 | NURSE SHARK | Complaint about elaborate ruse by quiet swimmer (5,5) |
| NARK (a grumble = ‘complaint’, Chambers confirms) around anagram (‘elaborate’) of RUSE + SH (‘quiet!’). | ||
| 11 | ELYSEE PALACE | Not half timely, spot friend, talented, in Paris building (6,6) |
| Half of ‘timELY’ + SEE (‘spot’) + PAL (‘friend’ + ACE (‘talented’, as in “he’s ace at crosswords”). | ||
| 13 | MAASTRICHT | Mother, initially awfully rigorous, securing hotel in city (10) |
| MA + A(wfully) + STRIC.T including H[otel]. Last in, because nothing starts with MAA…, does it? | ||
| 14 | FORTY-NINER | Gold-digger on outside’s yen to be included in frontier’s new arrangement (5-5) |
| ‘Outsides’ of YeN in anagram of FRONTIER. | ||
| 16 | ARMADILLO | Host’s endless fuss about hostile American native (9) |
| ARMy (endless ‘host’) + ADO (‘fuss’) around ILL (‘hostile’, as in ‘there’s ill feeling between them.’). | ||
| 21 | SHADE | Some blush a deep colour (5) |
| Inclusion in ‘bluSH A DEep’. | ||
| 22 | STAT | Numerical fact in beginning that’s not right (4) |
| STArT. | ||
| 23 | AYER | Philosopher’s arguments you embrace readily at outset (4) |
| 1st letters (‘at the outset’) of words 2-5 in clue. Ref. A.J. ‘Freddy’ Ayer. | ||
*anagram
Thanks Grant and Gurney. After doing the FT crossword for a few years, I have not seen the increasing difficulty Mon. through Fri. that many of you refer to. Some Mondays I have been completely stumped!
Todays was hard but fun.
I felt 26 was a bit weak I was expecting a different word for tact to used. It only fell in with the crossers. Otherwise a good puzzle
Contrapunctus @ 3
Surely that’s a sign of a good clue? Misdirecting you into looking for something that’s not there…
Thanks Gurney and Grant
Did this one quite late last night and was able to get it finished before I dropped off to sleep. Couldn’t find this variation of NARK, but assumed that it would be OK. Also couldn’t break the thought of having MAD=hostile in 16d and never parsed that one.
Finished in the SW corner with the clever TART, MAASTRICHT and CONE (which took an age to link to a ‘bollard’ and even longer to get the word play out – and became my clue of the day).
Lots of interesting clues and enjoyed it a lot.
Many thanks for the excellent blog, Grant, and thanks also to all who commented.
I thought 7 was a bit misleading, otherwise a fun solve.