Drunk driver getting round in? (8)
I believe the answer is:
carouser
'drunk' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for carouser that I've seen before include "He's having a wild time on the town" , "boozer" , "Noisy reveller" , "He's living it up, a party animal" , "partygoer" .)