Cryptic crossword No 2,774

Across

1. Gets one back in two days - swell! (7)
2. Start to tear up, or maybe down? (5)
3. Island where I un-age, cryptically? (3,6)
4. Hypnotises The Doors? (9)
5. Legal observer finally - finally - admits America is rubbish (5)
6. Transferral of energy beam, off every now and then (3)
7. Headdress shunning head of the city (5)
8. What Ofsted do: no place for praise (5)
9. Cat chasing drained, sweaty politician, causing a rash? (7)
10. In Lublin, I'm consuming Eastern European food (5)
11. Article defends company run as defunct IT firm (5)
12. Encourage return of golf international by Trinity term, producing young talent (7)
13. Dodgy rental corroded replacement (9)
14. Put Sodium before Chlorine for source of Ytterbium or Berkelium, say? (9)
15. Old group of singers arrange table, hosting suitable comeback (3,4)

Down

1. State thanks, amid uncertain expression (4)
2. Grill chicken with flowering plant (8)
3. Maybe get unstable measure of memory (8)
4. Maybe Peter, Paul and Mary are not on board (6)
5. Wise guy: how to organise Victoria's Secret warehouse? (8)
6. City's wearing fur coat (5)
7. Second-hand sample in shade, sun rising (4)
8. Where gangster crocodiles reportedly live? No they don't! (6)
9. Arrive before strike (4)
10. Bad smell a reason for being unable to buy booze? Apparently like us! (8)
11. Equivalent to mutant, an eccentric (10)
12. Dirty Ian, he rearranged - it's a date! (2,3,5)
13. Dismiss court from 7, riotous breakout (4)
14. Cry for help over exchange with disrupted rest, resulting in mental strain (6)
15. Dolphin missing every roly-poly (4)
16. Excitement from sidelines of hockey games (4)
17. 5 disaster to lose passport, perhaps? (6)
18. Pattern lines across interlocking directions initially? (5)