Leave scrap, put away parts (4,2)
I believe the answer is:
beat it
'leave' is the definition.
(I've seen this before)
'scrap put away parts' is the wordplay.
'scrap' becomes 'bit' ('bit' can be a synonym of 'scrap'**).
'put away' becomes 'eat' (I've seen this before).
'parts' is an insertion indicator (in the sense of cuts or separates).
'bit' enclosing 'eat' is 'BEAT IT'.
(Other definitions for beat it that I've seen before include "try out drum kit?" , "Scarper" , "Get going" , "Slang order to go away, get lost" , "make off furtively" .)