Gathers in spare parts (5)
I believe the answer is:
reaps
'gathers in' is the definition.
(I've seen this in another clue)
'spare parts' is the wordplay.
'parts' is an anagram indicator (the parts of the original word ordered differently).
'spare' is an anagram of 'REAPS'.
(Other definitions for reaps that I've seen before include "crops" , "Gleans or harvests" , "Harvests with strange spear" , "Cuts, gathers grain" , "Harvests (a crop)" .)