Cryptic crossword No 3,804

Across

1. Liaise with PC, dropping one criminal in solitary (7)
2. Surgery on earlobe at comprehensive (9)
3. Stretch out with President leaving Belgium (5)
4. Coupling with saint regularly by an alcove (7)
5. Cotton for one-table print-out (3,6)
6. How to re-order pronoun when crossing America? (3,4)
7. Milk flow (5)
8. French novel found in Italy? (5)
9. Mope about royal idiot (5)
10. Tin goatee disguised engineer (9)
11. Intense pressure of rubbish old problem you might want to drop (3,6)
12. Play ducks around the lines (7)
13. Transporting nuts to cool green Midlands parish (6,9)

Down

1. Scattered and partially disowned (4)
2. Clone part broken by moving in both directions (10)
3. Heads to Switzerland and greets economics expert (4)
4. Horniest ethicist gets around! (8)
5. Relieved cost of ledger has been halved (6)
6. Head lion oddly round? (4)
7. Finally work on side gate hinge (4)
8. Shouted "foul!" and withdrew (5,3)
9. Ringing clinic with anger, forgetting a reappointment (10)
10. Stop outrage, journalist threatened (10)
11. Demon-like animal (6)
12. Tiny portion of internet unimaginatively promoted (6)
13. 'E, around 'ere, perhaps comes from over the Channel? (8)
14. Tax for superior nitrogen content of vegetables gets plaudits (8)
15. Leans over Republican and rages (6)
16. Clotted cream smoothed over king and bishop (10)