Vet used pins with shock treatment (7)
I believe the answer is:
inspect
'vet' is the definition.
(inspect can mean to vet or check)
'used pins with shock treatment' is the wordplay.
'used' is an anagram indicator.
'with' is a charade indicator (letters next to each other).
'shock treatment' becomes 'ECT' (ECT is an example).
'pins' is an anagram of 'insp'.
'insp'+'ect'='INSPECT'
(Other definitions for inspect that I've seen before include "vet" , "Go over" , "Assess; examine" , "Examine closely" , "Examine officially" .)