Set out to marry drunk (6)
I believe the answer is:
stewed
'drunk' is the definition.
(I've seen this before)
'set out to marry' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'to marry' becomes 'wed' ('wed' can be a synonym of 'marry').
'set' with letters rearranged gives 'ste'.
'ste'+'wed'='STEWED'
(Other definitions for stewed that I've seen before include "felt uneasy" , "Drunk; cooked in pot" , "canned" , "Cooked slowly" , "Of tea, brewed too long" .)