Approval as Tom maybe gets drink (6,2)
I believe the answer is:
thumbs up
'approval' is the definition.
(I've seen this before)
'tom maybe gets drink' is the wordplay.
'tom maybe' becomes 'Thumb' (folklore character Tom Thumb).
'gets' is a charade indicator (letters next to each other).
'drink' becomes 'sup' (to sup is to drink).
'thumb'+'sup'='THUMBS-UP'
'as' is the link.
(Other definitions for thumbs up that I've seen before include "Indication of approval" , "okay" , "Digital signal" , "how hikers present requests" , "successfully received" .)