Confused or drunken set in AA (2,3)
I believe the answer is:
at sea
'confused' is the definition.
(synonyms)
'drunken set in aa' is the wordplay.
'drunken' indicates anagramming the letters.
'in' indicates putting letters inside.
'set' is an anagram of 'tse'.
'tse' put into 'aa' is 'AT SEA'.
'or' is the link.
(Other definitions for at sea that I've seen before include "Thrown" , "Disorganised; bewildered" , "Totally disorganised" , "in the Med?" , "Muddled on the ocean?" .)