Strong drink for courage (6)
I believe the answer is:
spirit
This clue is a double definition.
'strong drink' is the first definition.
(thesaurus)
'courage' is the second definition.
(thesaurus)
'for' is the link.
(Other definitions for spirit that I've seen before include "Supernatural entity" , "Scotch, maybe" , "Ghost - pluck" , "Animation or energy" , "25 28 [MARS LANDER]" .)