Cryptic crossword No 4,087

Across

1. Helping you go? Senna would do the trick (8)
2. West after crazy four sided shape. Aim that at the target. (7)
3. Sounds like Spanish wine slices the meat (6)
4. If you coil a pea badly it could lead to hair loss. (8)
5. Those who jump on ship stay the night at school (8)
6. Firm before the rodents? Nice pear. (6)
7. Alternative Mr. Diet cut at 45 degrees (6)
8. Certain before you give him the sack? It's bound to happen. (8)
9. Not out after endless derogatory remark is a drug. (7)
10. Secure after passing away? (8)
11. Nothing taken from travelling around to solve it. Alan's your man. (6)
12. Hook and loop could be left in strange cover. (6)
13. Rearrange singers after Gryff's partner to see a wise man. (8)
14. Really bad dire TV? Send another way. (6)

Down

1. Brother of Esau before Mr. McKellan? 1603-1625 perhaps. (8)
2. Area for Wimbledon litter pickers? Not the tube (10)
3. Right in the middle of an evil person? Nah, he's a mate. (6)
4. Band leader to help others when playing guitar. (7)
5. Nothing after music performance? Could be Beethoven's 5th. (8)
6. Sort out the equine female for a wad of paper. (4)
7. Contained in terrapin cereal is an attack on both sides. (6)
8. Could be a metaphor or simile. It's not literal. (10)
9. I scoot in somehow to be of equal tension. (8)
10. All consuming beast. Meat and two veg will do. (8)
11. Noah's boat is part of avian high flier singing in the air. (7)
12. One before the witching hour. Well that's one football team. (6)
13. Suits a penguin! (6)
14. Two companies? He's a clown. (4)