Cryptic crossword No 3,536

Across

1. Making a mistake by cutting head off a fish. (6)
2. Geek returns to almost cold issues. (8)
3. Conflicts catch offender like Hess and Goring. (3,9)
4. Draws a race run before parts of a play. (8)
5. Nasty remark about old mobile and a mammal. (8)
6. Give up short regular payment with a small amount. (8)
7. About a bar to be intelligent. (6)
8. Bird surrounded quiet sweetheart. (6,6) (12)
9. From side to side like this clue. (6)
10. Nurse has the energy to do a job. (6)
11. Go over regarding scene. (6)
12. A party splits animal sound in open grassland. (6)

Down

1. The French surround crashed train. Somewhere to go. (8)
2. Yasser has lost a note but has a right to mount. (6)
3. State elderly taken as mean. (8)
4. Edge fastens plants. (8)
5. Cast dynamo as one of seven. (6)
6. Hotel broadcast by show. (4)
7. Pull violently with this tool. (6)
8. Piece of Windsor maybe. (6)
9. He loves to redo amiss centre park. (6)
10. Alien with sodium explodes from time to time. (4)
11. In front of someone who looks after a vehicle. (8)
12. Where a doctor might leave their uniform when off duty. (8)
13. Help someone financially who is under water. (4,4)
14. Discovered the cost of public relations decorated. (6)