Short, a film maybe (5)
I believe the answer is:
drama
'film maybe' is the definition.
(drama is a type of film)
'short a' is the wordplay.
'short' becomes 'dram' (both can mean a small alcoholic drink).
'dram'+'a'='DRAMA'
(Other definitions for drama that I've seen before include "Exciting event sequence" , "Play - crisis" , "Plays as branch of literature" , "Play; emotional event" , "spectacle of emotion" .)