Run through spare parts (5)
I believe the answer is:
spear
'run through' is the definition.
(thesaurus)
'spare parts' is the wordplay.
'parts' indicates anagramming the letters (the parts of the original word ordered differently).
'spare' with letters rearranged gives 'SPEAR'.
(Other definitions for spear that I've seen before include "Long pointed weapon" , "Primitive weapon" , "A bit of asparagus" , "Lance" , "Asparagus shoot" .)