Cryptic crossword No 1,899

Across

1. Rubbish poetry aches endlessly – that's the long and the short of it (7)
2. Bungling pal fleeced by gold-digger in the end (7)
3. Front of blockade let down for liberal lord (5)
4. Looking in mirror, see what wicked types may be up to (3)
5. Carved item bound for synagogue possibly includes symbol different from cross (5,4)
6. Once humans have died off, he'll really push the envelope... (7)
7. ...knocking around at nine hundred like Methuselah (7)
8. Comic character's a friend of Batman and Superman (5,10)
9. Head of airline's very happy to abandon old fighter pilot (7)
10. One who fancies getting married, perhaps? (7)
11. Cooler's nice and fiery wings discounted (5)
12. Hamburger's good and natural (3)
13. Unprofessionally laid down in the middle of pillow fight (3-2)
14. Wolf impressed by home that's most unlike a pig sty (7)
15. Sister bandages injury at work, ultimately doing this? (7)

Down

1. See 12a
2. Calm helper regularly stops PG Wodehouse's lead character getting upset (6)
3. Novel about vessel almost too detailed (4,4)
4. Spanish dish needing one bone but tossing out another (6)
5. Old writer taps tablet to reveal parody (8)
6. Master has flogger in Fifty Shades of Grey? (4,6)
7. Talented but short Poirot figured out quick getaway method (13)
8. Doing job from home, or sticking the telly on? (6,7)
9. Such a message in album is unexpectedly left (10)
10. They'll draw up contracts excluding certain stars (8)
11. Row about high-pitched electronic beeping on phone (4,4)
12. High-flying American brothers picked up parts of bill (6)
13. Flat whites you wouldn't want to swallow (6)
14. Court order put solicitor's nose out of joint (4)