1973 Woody Allen film (7)
I believe the answer is:
sleeper
'1973 woody allen film' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sleeper that I've seen before include "provide on-line support?" , "Railway track support" , "Form of transport" , "Train with berths" , "An overnight train?" .)