Withdraw when one's influence is not wanted (4,3)
I believe the answer is:
pull out
'withdraw' is the definition.
(pulling out is a kind of withdrawing)
'one's influence is not wanted' is the wordplay.
I cannot really understand how this works, but
'influence' could be 'pull' (I've seen this in another clue) and 'pull' is found within the answer.
'not' could be 'o' (I've seen this in other clues) and 'o' is located in the answer.
The remaining letters 'ut' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'when' is the link.
(Other definitions for pull out that I've seen before include "Detachable section of a paper/magazine" , "Withdraw" , "Detachable section of a magazine or newspaper" , "Supplement, perhaps" , "withdrawal" .)