Quit – and enlist once again? (6)
I believe the answer is:
resign
'quit' is the definition.
(I know that quit is a kind of quit)
'enlist once again?' is the wordplay.
I cannot quite understand how this works, but
'again?' could be 're' (prefix meaning 'again') and 're' is located in the answer.
The remaining letters 'sign' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'and' is the link.
Can you help me to learn more?
(Other definitions for resign that I've seen before include "Turn over" , "Give up one's job" , "Give up position" , "Hand in one's notice" , "Stand down" .)