Short temper? (6)
I believe the answer is:
spirit
I believe this is a double definition.
'short' is the first definition.
(small drink of spirits)
'temper?' is the second definition.
(thesaurus)
(Other definitions for spirit that I've seen before include "enthusiasm" , "Strong distilled alcohol" , "Vital force - apparition" , "The sort of drink" , "Life-force" .)