Hand over booze — It'll get you over the border! (8)
I believe the answer is:
passport
'it'll get you over the border' is the definition.
'hand over booze' is the wordplay.
'hand' becomes 'pass' ('pass' can be a synonym of 'hand'**).
'over' is a charade indicator (letters next to each other).
'booze' becomes 'port'.
'pass'+'port'='PASSPORT'
(Other definitions for passport that I've seen before include "that may gain acceptance" , "This ensures admission" , "Travel doc" , "Travel ID" , "entry permit?" .)