Across
Initially mysterious pseudonyms shifting one's anxious feelings (8)
Influential American wants one of Groucho's kin sent into retirement (5)
Church stands next to empty Russian laboratory (4)
Unusual chemise and odd robe regularly stained (10)
Someone in The Imitation Game, perhaps? (5)
Made from denim, Rodin's first couple of pieces took subject less seriously (7)
Lines going around the world will snub Luther's latest theses (6)
Parasite essentially libels medic with virus (3,3)
Effortlessly quirky Dali bored by a certain piece in Spain? On the contrary (7)
Urge some lesser Pentagon characters to turn to the other side (5)
Desperately stir acidic bits of crème fraîche? (10)
Greek character placing ring on yours truly - much obliged! (4)
During chorus, trumpeters play strings (5)
Soprano picked up yeti, perhaps, as a bit of theatrical action (8)
Down
Gadget for film or photography that's part of the machine age (6)
Forest dweller still in its youth's a horny spirit, we hear (4)
CIA meeting with Boris for a change, levelly maintaining pressure (8)
Fancy peccadillo finally committed away from home (6)
A pair of experts tackling sort of dog that can be secured (10)
One's learned to be vigilant about roaming charges (8)
US representative drills through ecclesiastical site (it's a source of oil) (6)
Performers of one kind or another taking lead from tempo instead of libido (3,7)
Cockney's extremely vigorous when holding up flight, ultimately making you the last to arrive (8)
Big reveal sees English banker trap unknown figure by safe (8)
Certain philosophers revolutionised science with big apple (6)
Writer had visor and mask lifted now and again to deliver some vernacularisms (6)
Post for Methuselah? (Letters for 26 others are enclosed here too) (6)
Little monkeys and little apes scratching skin on crotch (4)
Type letters or click words in the clue