Cryptic crossword No 2,167

Across

1. In favour of heaps of particles at the centre of everything (7)
2. Old man holding hard sash hang-up (6)
3. Likely woman in pub, not unknown (known to Basil), joining show (8)
4. Half of filled cream puffs for just deserts (6)
5. "You is restful" correct?  I'll leave you to it (4,8)
6. Tom Largish decrypted instructions (10)
7. South African sense picked up, used to be worth sixpence in Australia (3)
8. Finally sails back maxi and skim over water perhaps? (3)
9. Excellent new nerd goes west meets someone acting in the role for events happening every four years (10)
10. If without question, IQ makes sense (12)
11. Germany rules crack (6)
12. ‘E’ll shout in trouble and foot the bill (5,3)
13. Enjoy dressing? (6)
14. Taps arts boost regularly for you.com, say (7)

Down

1. Doubly good shellfish from New Zealand (4)
2. The origins of my straight-shooting Kalashnikov are a big Siberian city  (4)
3. Old boy starts to imagine the unseen awaiting lines read out at a funeral (8)
4. Rent with power to leave? (5)
5. Love with Harry arranged and occuring every hour (6)
6. Regularly fob off with euro zen-affected barrier? (6,4)
7. Phoney American spooks found inside airlift mayhem (10)
8. Materialised in temporary loo medics built  (6)
9. German director the Reverend declared a fish spotter (10)
10. Socialite frenzied with greed primarily is selfish and vain (10)
11. Thanks, I hear you're in charge of bull (6)
12. Okay, I did it mother, carrying each cup left inside (3,5)
13. Demented gales around the onset of dusk in dells (6)
14. In the bats I see announced there is a moral standard (5)
15. Half a drum tab finally and typically underground (4)
16. Test altered and any marked alteration should be ignored  (4)