Qualify to get drink producing ID (8)
I believe the answer is:
passport
'id' is the definition.
(passport is a type of identification)
'qualify to get drink' is the wordplay.
'qualify' becomes 'pass' (as in passing an exam or qualification).
'to get' says to put letters next to each other.
'drink' becomes 'port' (port is a kind of drink).
'pass'+'port'='PASSPORT'
'producing' acts as a link.
(Other definitions for passport that I've seen before include "Travel doc" , "Carte blanche" , "one admits" , "Official document required for foreign travel" , "is the open sesame" .)