Enthralled by alcoholic drink, performing solo (5)
I believe the answer is:
alone
'solo' is the definition.
(I've seen this before)
'enthralled by alcoholic drink performing' is the wordplay.
'enthralled by' means one lot of letters goes inside another ('enthral' can mean 'capture').
'alcoholic drink' becomes 'ale' (I've seen this before).
'performing' becomes 'on' (I've seen this in other clues).
'ale' enclosing 'on' is 'ALONE'.
(Other definitions for alone that I've seen before include "Isolated; exclusively" , "Without others present" , "Unaccompanied" , "On one's own" , "Isolated from others" .)