Polish servicemen disarm traps (5)
I believe the answer is:
emend
'polish' is the definition.
(I've seen this in another clue)
'servicemen disarm traps' is the wordplay.
'traps' indicates the answer is hidden within the clue (the answer is 'trapped' somewhere in the clue).
'EMEND' is hidden within 'servicemen disarm'.
(Other definitions for emend that I've seen before include "Improve by altering" , "Remove errors" , "Revise (a text) (E, not A)" , "Make changes to (a text)" , "Modify" .)