A relatively quick solve for me this week with everything done and dusted within about half an hour. Does this mean that the puzzle was easier than usual or just that I had met most of the more obscure entries/definitions previously? Perhaps a combination of both.
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Across
1 Doctor, unhappy with loss of power, criticises American tricks (10)
MOUSETRAPS – MO (doctor) U[p]SET (unhappy with loss of power) RAPS (criticises)
11 Row about blunder in inventory (7)
TERRIER – TIER (row) around (about) ERR (blunder)
12 Article among cuttings about old-fashioned scouts (6)
SPIALS – A (article) in (among) SLIPS (cuttings) reversed (about)
13 Disposed of current and former coins (5)
SOLDI – SOLD (disposed of) I (current)
14 Crazed guys admitting nothing about second prank (4-8)
MOON-STRICKEN – MEN (guys) around (admitting) O (nothing) ON (about) S (second) TRICK (prank)
15 Members of band in township stopping crime (7)
SIDEMEN – DEME (township) in (stopping) SIN (crime)
17 Meaning to miss date, creating split (4)
RIFT – [d]RIFT (meaning to miss date)
18 Very end of cruel attack (6)
ASSAIL – ASSAI (very) [crue]L (end of cruel)
19 Refusal of liability from hospital in treatment of clone (6)
NOCHEL – H (hospital) in an anagram of (treatment of) CLONE
21 Leap in measure of electric potential (4)
VOLT – double def.
24 See appeal and eccentricity in droll humour (7)
VITREUM – V (see) IT (appeal) plus E (eccentricity) in RUM (droll)
25 River dam covering wide area, limit for sea-going ships (12)
DEEPWATERMEN – DEE (river) PEN (dam) around (covering) W (wide) A (area) TERM (limit)
27 Society in nation backing religion (5)
ISLAM – S (society) in MALI (nation) reversed (backing)
28 Relax in university and take notice before finish (6)
UNBEND – U (university) NB (take notice) END (finish)
29 Clothing accessory from Italy seized by sleuth with insolence (3,4)
TIE CLIP – I (Italy) in (seized by) TEC (sleuth) LIP (insolence)
30 Regretted going around, consuming time badly, in variable gear (10)
DERAILLEUR – RUED (regretted) reversed (going around) around (consuming) ERA (time) ILL (badly)
Down
1 Believer in animal magnetism taking part in games merrily (6)
MESMER – hidden in (taking part in) ‘gaMES MERrily’
2 Mussels in endless combination (4)
UNIO – UNIO[n] (endless combination)
3 Keep up stirring chant at speed (5,3,4)
STAND THE PACE – an anagram (stirring) of CHANT AT SPEED
4 More caught by alien net (6)
EELSET – ELSE (more) in (caught by) ET (alien)
5 Coward needing care wrongly put in charge (8)
RECREANT – an anagram (wrongly) of CARE in (put in) RENT (charge)
6 Dry up in saying a line in written report (6-6)
PROCES-VERBAL – SEC (dry) reversed (up) in PROVERB (saying) A L (a line)
7 Glossy / Scottish seal (5)
SILKY – double def.
8 Plot followed by movie losing force in incident that’s tormenting (11)
BEDEVILMENT – BED (plot) plus [f]ILM (movie losing force) in EVENT (incident)
9 Care in neatly cutting even pieces of hair (6)
CRINAL – C[a]R[e] I[n] N[e]A[t]L[y] (care in neatly cutting even pieces)
10 Curtailment of sentence I oppose is as ordered (11)
APOSIOPESIS – an anagram (ordered) of I OPPOSE IS AS
16 Point raised about one storyteller’s skin disease (8)
MILIARIA – AIM (point) reversed (raised) around (about) I (one) LIAR (storyteller)
19 Condition after stripping untidy ground (6)
NUDITY – an anagram (ground) of UNTIDY
20 Indentation made by tip of needle in basket (6)
CRENEL – N[eedle] (tip of needle) in CREEL (basket)
22 Upset revolutionary with final offer (6)
TENDER – RED (revolutionary) NET (final) reversed (upset)
23 Explosive was first concealed locally (5)
HELED – HE (explosive) LED (was first)
26 Simple declaration of commander (4)
MERE – a homophone of (declaration of) ‘meer’ (commander)
Thanks Gaufrid and Beelzebub.
Not high up the difficulty rating, as you say, but I’d give it a lot more stars for its enjoyability.