Pistol not used at the front? (7)
I believe the answer is:
sidearm
'pistol not used at' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'front?' is the wordplay.
I cannot really see how this works, but
'front?' could be 'side' (front is a kind of side) and 'side' is found in the answer.
The remaining letters 'arm' 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).
'the' is the link.
(Other definitions for sidearm that I've seen before include "Piece" , "One may be fired" , "Officer may carry this" , "weapon" .)