Quick to get topers drunk (6)
I believe the answer is:
presto
'quick' is the definition.
(I've seen this before)
'topers drunk' is the wordplay.
'drunk' indicates anagramming the letters.
'topers' is an anagram of 'PRESTO'.
'to get' acts as a link.
(Other definitions for presto that I've seen before include "quickly in bars" , "In a quick tempo (music)" , "In quick tempo (mus.)" , "Moving quickly" , "hey......,cries the magician" .)