Confuse two daughters introduced to beer (5)
I believe the answer is:
addle
'confuse' is the definition.
(I know that addle is a type of confuse)
'two daughters introduced to beer' is the wordplay.
'two daughters' means two replacements for 'daughters'.
'daughters' becomes 'd' (genealogical abbreviation for daughters).
'daughters' becomes 'd' (genealogical abbreviation for daughters).
'introduced to' is an insertion indicator.
'beer' becomes 'ale' (type of beer).
'd'+'d'='dd'
'dd' placed into 'ale' is 'ADDLE'.
(Other definitions for addle that I've seen before include "confusing" , "Like a bad egg" , "Confuse - decay" , "Go rotten" , "Confuse; go off" .)