Answer: sleeper

AnswerCrossword Clue
sleeperA secret agent who remains inactive for a long period while establishing a secure position
SLEEPERWoody Allen classic
SLEEPERWord with light or heavy
sleeperA sleeping car
sleeperA stocky fish with mottled coloration that occurs widely in warm seas and fresh water
sleeperA train carrying sleeping cars
sleeperA railroad tie
sleeperA thing used for or connected with sleeping, in particular
sleeperA sofa or chair that converts into a bed
sleeperA person with a specified sleep pattern
SLEEPERRailroad car with berths
sleeperA person or animal who is asleep
sleeperAn antique whose true value goes unrecognized for some time
sleeperA movie, book, play, etc., that achieves sudden unexpected success after initially attracting little attention, typically one that proves popular without much promotion or expenditure
SLEEPERUnderdog with a chance
SLEEPERTrain component
SLEEPEROne in dreamland
SLEEPERSurprisingly successful film
SLEEPERCar with beds
SLEEPERSurprisingly popular film
SLEEPERAllen film: 1973
SLEEPERRailroad car
SLEEPERUnheralded success
SLEEPERVan Winkle, e.g.
SLEEPERWoody Allen film
SLEEPERAllen film
SLEEPERRuddy duck
SLEEPERSurprising success
SLEEPERBeauty, for one
SLEEPERA Woody work: 1973
SLEEPER1973 Woody Allen movie
SLEEPEREarly Allen film
SLEEPERTrain car
SLEEPERTrain car - Strips again
SLEEPERCertain train car
SLEEPEROne out?
SLEEPER... of 1973
SLEEPERType of hit?
SLEEPERUnexpected hit
SLEEPERWoody Allen flick