Blow one's top in the wrong gear (4)
I believe the answer is:
rage
'blow one's top' is the definition.
(I've seen this in another clue)
'wrong gear' is the wordplay.
'wrong' is an anagram indicator.
'gear' with letters rearranged gives 'RAGE'.
'in the' acts as a link.
(Other definitions for rage that I've seen before include "Fad or anger" , "High dudgeon" , "Fury, passion" , "storm" , "Anger - fashion" .)