Cryptic crossword No 3,959

Across

1. Tempestuous Shakespearean character (not Bottom) with sex appeal and unknown fortune (10)
2. Mrs Grundy beginning to enjoy adopting nasty entitlement (9)
3. Keen as mustard at first, sours inside by noon (5)
4. Bone up close to the start of test (5)
5. Put forth cryptic tort (4,3)
6. Mother avoids yeasty spread after Lawrence finds insect (7)
7. Greek character droned on confusingly about dead tree (12)
8. Taking part in tantric hijinks provides vital energy (3)
9. First lady in 1930s to publicise fabric softener on the radio (7)
10. Consider umpire's call to put a cork in it! (7)
11. Remove from the social club? (9)
12. Rips up romp with brio and debasement (10)
13. Stand and loiter oddly (3)
14. Refine top GPS in order to find woodland on London's borders (6,6)

Down

1. This system is the same no matter which way you look at it (5)
2. Tried to follow messy instructions section initially and overestimated (9)
3. Instruction to avoid the raffle? (2,3,5)
4. Loopy from drug after drug (8)
5. Two-piece band to begin with before relations beset by egos (6)
6. Discuss: 12 + 21 = Fruit (6)
7. Waste fluid (5)
8. Interpol is lying about concealing missile facility (4)
9. Former Muslim historically coming to South West region (6)
10. Provides witty remarks online? (6)
11. Fool essentially squanders most of salary on crap (10)
12. This channel principally splits up Egyptian zones (4)
13. Disparaged having dubbed with myself replacing original actor (8)
14. Spooner's heathland bivouacs lead to pains in the neck (8)
15. Resolutely cool Hemingway without hint of affectation (2,7)
16. Current copilot unfortunately a party animal (8)