Anything that gets a thug drunk (5)
I believe the answer is:
aught
'anything' is the definition.
(thesaurus)
'a thug drunk' is the wordplay.
'drunk' indicates anagramming the letters.
'thug' with letters rearranged gives 'ught'.
'a'+'ught'='AUGHT'
'that gets' acts as a link.
(Other definitions for aught that I've seen before include "Nothing" , "Anything at all (archaic)" , "Emphatically anything" , "Anything (Shakespearean)" .)