Turkey stuffing for Peter's pepper (6)
I believe the answer is:
strafe
'pepper' is the definition.
(I've seen this before)
'turkey stuffing for peter's' is the wordplay.
'turkey' becomes 'tr' (abbreviation eg in internet addresses).
'stuffing for' is an insertion indicator.
'peter' becomes 'safe' (slang term).
'tr' put inside 'safe' is 'STRAFE'.
(Other definitions for strafe that I've seen before include "bombing raid" , "Set RAF to attack with gunfire" , "Blast, shell" , "Spray with bullets" , "low attack" .)