Cryptic crossword No 2,893

Across

1. Flâneur openly taking in his surroundings, presumably (6)
2. New recruits mostly speak without thinking to begin with (8)
3. Recordings of United overwhelmed by Barcelona's cheers (6)
4. Reptile in trap to wriggle round here after shedding skin (8)
5. Crew have to abandon second ship (5)
6. Shoots, flowers, evergreen, peace at last (5,4)
7. Parrot not quite as dead as a dodo? (7)
8. Try to find someone faithful using phone (4)
9. Throw out swimmer moving back to front (7)
10. Dreadful private school grad with debts stuck outside No 10 (9)
11. Letter from Rolling Stone clutched by woman now and then (5)
12. Network when in lofty surroundings - might an icebreaker be useful there? (8)
13. Just about out of debt, with a few coins (6)
14. Sending water away, ordered red again or a dear gin? (8)
15. Inscrutable setter's met with a lot of criticism (6)
16. Olympians possibly left out of medals (4)

Down

1. See 21
2. Cases of old politician popping into drinks (8)
3. Comes through or, alternatively, is routed (5,3)
4. Battering ram opened front (9)
5. Exaggerate somewhat, in more ways than one (4-3)
6. Republican instead of Democrat returned – fix! (6)
7. It's seventy feet but only one metre (6)
8. A flat for one some singleton's flipped (4)
9. Amateur match official wearing protective gear or not (8)
10. Perhaps it means, roughly, about meaning (8)
11. Wise man wrapping present (7)
12. Trouble with flies? A&E fixed up nether region (4,6)
13. Playwright crouched down to audience (6)
14. Element of social media site nobody backed (5)
15. Upwardly mobile clergyman going to a load of balls in Pride and Prejudice? (5)
16. Insect to go slowly and then go quickly (9)