Cryptic crossword No 4,079

Across

1. See 1a
2. Fiona confuses Sir Hog (6)
3. Character actor in London experimented with broken-up parts, chasing money (14)
4. Timekeeper will get large yard, but not first (8)
5. Herbal green snakes twist together to make ways (8)
6. Decision to veto baffled (4)
7. Etta James hit lost time in collection of maps (5)
8. See 31a
9. What so many songs are about - crazy wino's bar! (8)
10. German agrees profit for Jackson (5)
11. Algae jelly has no radius, moved to South in series of events (4)
12. European Commission stands still beside oneself (8)
13. Adventuring off diner tip (8)
14. Skin treatment is crazy personal! (8)
15. Spanish but hides in confusing cameos, hopeful get out? (10)
16. Spinner see wild West Asian sun block? (10)

Down

1. Function with no energy - what none are without? (3)
2. Real midwife starts jolly enjoyable clinical trials (6)
3. Songwriting has Cyril baffled (5)
4. Announce disdain for shelf? Understood (9)
5. Starting antibiotics should help put out fire (3)
6. Personal stench and weight lifted; a small drop (4)
7. Quickly leave international talent show (3)
8. Sleep without tee to be home shortly? (3)
9. Short southerner has energy to follow French also (6)
10. Accountant's reports scare Kelvins (5)
11. English church chamber kept secret (7)
12. I hide in changed eyes, many such entries (6)
13. Do carpets get dirty? I'll talk about it (9)
14. Chance of rain - information is king (4)
15. Airline means for trip goes crazy for puzzlemaster (10)
16. See 14d
17. Overthrow a king without fitness training - rearranged for the narrative (4)
18. Mentally unstable hide information, then unfurl - it's all rather dull (7)
19. Start backwards agreement in principle, then object - a tired opener, perhaps? (5)
20. Spread around a surface without order and special force - a fantasy (5)