Cryptic crossword No 4,111

Across

1. Psychopath let empty houses: expert in field? (7)
2. Go off special lubricant (5)
3. Recognises return as time travel? (6,2,4)
4. Lone whale swimming makes holiday (9)
5. Something seedy to add enjoyment and a seasonal flavour? (7,5)
6. Good man, or leader of men or one of the X-Men (5)
7. Perfect example of cunning, with energy characteristic of a group (9)
8. Remove guilt from families smuggling drug, with first sign of empathy (7)
9. Offensive cocktail? (7)
10. Cried, very happy about Berlin agreement, with leading figures of Christian Union (10)
11. These are abundant in the brave or obese? (4)
12. Drop everything east of fighter plane (4)
13. Reserved, though muscular (8,2)
14. Easier-to-understand Le Carré novel (7)

Down

1. Where to find “Clownfish” we hear? (8)
2. Conversation about cellophane mostly (5,4)
3. Hesitation, after short time, becomes driving force (8)
4. Part of church bolstering king to be mischievous one (5)
5. Mind revising PSHCE around end of day (6)
6. Weep in front of personal trainer - bury me here! (5)
7. Intelligence has a charm (9)
8. I’d rather not say to CNN “memo is wrong” (2,7)
9. Serve raw as sous-chef? (9)
10. Dish is crusts of pizza with drop of light ale drunken (6)
11. Deserts illegal views, periodically (6)
12. Dash off over tree: how showy! (6)
13. Heel spurs lump coming up occasionally with colour (6)
14. Performed one chore to be noble (6)
15. Butcher start of Hallelujah by vocalising backwards (5)
16. African country’s party game (5)