Go off drink daughters imported (5)
I believe the answer is:
addle
'go off' is the definition.
(eg an egg might addle)
'drink daughters imported' is the wordplay.
'drink' becomes 'ale' (type of beer).
'daughters' becomes 'dd' (a genealogical abbreviation for daughter repeated).
'imported' is an insertion indicator.
'ale' enclosing 'dd' is 'ADDLE'.
(Other definitions for addle that I've seen before include "Muddle or confuse" , "Rot" , "Confuse; become rotten" , "Scramble" , "Go rotten" .)