Cryptic crossword No 1,737

Across

1. Maybe Anna Ptaszynski's opening new email on installing drive (10)
2. Dan may get belted by great fighter here (4)
3. Old partners backed party that's more blue (5,2)
4. Foolish Chameleon and heads of department invited to do with listeners (7)
5. Perhaps Sandi Toksvig saves day, getting Pride participant a flower (9)
6. Originally, Alan Davies insists online spin-off is "so long" (5)
7. Andrew Hunter Murray's novel dismissing awfully rude new president (5,1,6)
8. Full set of encyclopaedia consumed by a bank of researchers - they're very sharp (6)
9. James Harkin cut down lengthy Fish (5)
10. Great thinker with bottle according to some Londoners (9)
11. Woman's email stash excludes all odd characters and loners (7)
12. Sets of QI clues deciphered (7)
13. Secretive character brought back by Anne Miller (4)
14. Contradict Andy at live tours, replacing one iffy point with another (10)

Down

1. Instalment of show from vinyl record is outstanding, we hear (7)
2. Type of switch pressed down by vacuous know-it-all Alex Bell? (6)
3. A certain director-general initially erratic and tense (2,4)
4. Sort of crossword left unfinished, along with Dan Schreiber's sources for yetis? (8)
5. Inner membrane of garment regularly going over top (6)
6. Better line up on stage when entertaining back in Greenwich (8)
7. "Fish no longer in existence", says Spooner... No Such Thing As A Fish? (7)
8. Flashiness seen in Private Eye article skewering a trio of zealous leaders (6)
9. A tag written on net does this to #getannaontwitter (8)
10. Immoral man elected to bank (4,2)
11. Eccentric act on air presents anorakish item (8)
12. Stripped down version of Wasps on pause... it's a good cover for the road (7)
13. Went without food around teatime, ultimately? On the contrary! (7)
14. Missing a buzzer's sound ahead of broadcast (6)
15. Pilot is detailed about four random facts (6)
16. See 15a