Cryptic crossword No 3,620

Across

1. Frequent precursor to dropping litter (12)
2. Mail boss maybe discovered media storm? (6)
3. Speaker control with true current flowing (12)
4. Swooning over Norwegian boxing master (8)
5. Hire Manor House to ultimate numpty with fatal result (8)
6. Youngest leader for emergency services (6)
7. Zeus getting around Old Testament benevolence? (8)
8. Eastern philosophy 26 adopted since travelling west (4)
9. Tended since becoming naked to get wrinkled (8)
10. Imprison criminal after getting exonerated at first (4)
11. Very foreign criminal let off (8)
12. Misinformation about commercial facilities (6)
13. Characters in backing tornado posing as slaters (8)
14. One wing of nudism getting half undressed - typical! (6)

Down

1. Abysmal ignorance let leaders of Eurosceptics engineer leave vote (7,8)
2. After ball read about description of twelve; (8)
3. Difficult moment for priest in see (6)
4. Main science lady regularly lost cool, gone radical (10)
5. Wise men conjure primarily with…with fairy’s accoutrement (5,4)
6. Occasionally try and sip marrow of hip bones (5)
7. Arcades: litter going up (10)
8. Unpleasant smell inside case of obsolete instrument (4)
9. Peace cut short by Canadian singer's instrument (9)
10. Exposed evil at heart of Heather's existence (6)
11. Pool money with mate for pétanque finals (4)
12. Cryptically making Enid tuck in (3,2)
13. Love cycling to Cambridge, perhaps, gaining speed (8)