Exact retribution for raven getting caught (6)
I believe the answer is:
avenge
'exact retribution for' is the definition.
(to avenge is to get retribution for something)
'raven getting caught' is the wordplay.
'caught' says the answer is hidden in the clue (I've seen 'catches' mean this (the answer is caught in the clue)).
'AVENGE' is hidden within 'raven getting'.
(Other definitions for avenge that I've seen before include "Get even" , "Get satisfaction for wrong done" , "Take satisfaction for injury received" , "Geneva (anag)" , "Retaliate on behalf of" .)