Wrecked gear in anger (4)
I believe the answer is:
rage
'anger' is the definition.
(rage is a kind of anger)
'wrecked gear' is the wordplay.
'wrecked' indicates an anagram.
'gear' anagrammed gives 'RAGE'.
'in' acts as a link.
(Other definitions for rage that I've seen before include "Mania" , "Fashionable" , "Fury, passion" , "Cult - passion" , "Terrible temper" .)