Film tank tracks (9,4)
I believe the answer is:
reservoir dogs
'film' is the definition.
'tank tracks' is the wordplay.
'tank' becomes 'reservoir' (reservoir is a kind of tank).
'tracks' becomes 'dogs' ('dog' can be a synonym of 'track').
'reservoir'+'dogs'='RESERVOIR DOGS'
(Other definitions for reservoir dogs that I've seen before include "Quentin Tarantino film" , "Crime drama film (1991)" .)