Sad film of little dish (6)
I believe the answer is:
weepie
'sad film' is the definition.
'little dish' is the wordplay.
'little' becomes 'wee' ('wee' can be similar in meaning to 'little').
'dish' becomes 'pie' (I've seen this before).
'wee'+'pie'='WEEPIE'
'of' acts as a link.
(Other definitions for weepie that I've seen before include "Something very sugary" , "Novel type" , "Highly emotional film" , "sloppy work" , "Film that makes you cry" .)