Cryptic Snakewords

Fill this 12x12 sudoku using 12 different letters of the alphabet. These must be determined, and can be entered into the circles at the bottom when found.

Each letter must appear once in every row, column and box.

The answers to 18 cryptic crossword clues can be found along hidden snakes, each starting at a coloured cell, moving orthogonally between cells, and finishing at the matching coloured diamond. Both start and end cells show the corresponding clue number.

Any cell (including a coloured cell or diamond) may appear on two different snakes, but two snakes may not share more than one cell with each other. A snake may not cross itself.

CLUES:

1. Suppress lust if led inside
2. Not for profit within a station
3. Production for people of a certain age
4. Hero left after I joined the party
5. Unknown person is more unusual
6. Metal sheet becomes first fossil fuel
7. Getting worn down by ignored mess
8. Many boys take in nothing
9. Performances featuring Bryan Adams initially removed from gift bags
10. A drug to give you a heavenly body
11. Having the right to be named
12. Fat on a piece of bacon
13. On the other hand, badger returns to music producer
14. Having a feeling that North-Eastern signs are wrong
15. Deduce from a different angle
16. Old gang read periodically
17. London museum disregarded Latvian language
18. Starts focusing on robbing the secure building