Cryptic crossword No 2,765

Across

1. Stumbling along, one in group of five gets to hotel in NY (9)
2. Doctors say perhaps the age of carbonated drink's died out (4,5)
3. Whisky exporter Buffy's boast? (5)
4. Agitated amateur journalist hugs judge (7)
5. Pope's in town (5)
6. State of coat of eastern snow leopard (7)
7. Queen of country's drunk twenty espressos just for a starter (7)
8. Early sonar's acoustic sounder detected incoming craft only at the front (5)
9. Kid with shiner yelled (3)
10. Ultimately realise your old student's radical (5)
11. Country without advanced energy weapon (7)
12. Great communist's third cigar endlessly rolled (5)
13. Praising leaders abandoning subsequent market research (9)
14. Ray traps condemned Nazi in plant (9)
15. Partially regret night backflipping in Bury (5)

Down

1. Got boat dismantled in middle of Shoreditch (8)
2. Take a step back from retriever shedding pelt (4)
3. Hephaestus' problem's unidentified by Reverend Spooner (8)
4. Sodium supplemented to figs Juan peeled for lizard (6)
5. Maintain Kylie's jet (4)
6. Wide, healthy mammal (5)
7. Mechanic's travelling in China, etc (10)
8. Infrequently seen Ainu mirage: ghost of Japan's red flier (8)
9. Fez trainee developed liquid for cars (10)
10. In Norway, chop top off small growth (6)
11. Stick up seven vacant American stars (4)
12. Bucket sound made by less bassy electronic keyboard? (8)
13. See 28d
14. Carrie played a role again (4,6)
15. The Observer's cover lied about tailing heads of Ernst & Young (6)
16. Producers of 18s relieving pressure from sickness (4)
17. Hint of hesitation in grandmaster's start (4)
18. Large volume found in river dig (5)