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 anagramming the letters (out can mean wrong or inaccurate).
'to marry' becomes 'wed' (synonyms).
'set' is an anagram of '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" .)