Crossword Genius

Smash hit from Hammer? (11)

Ross

I believe the answer is:

blockbuster

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'smash hit' is the definition.
(I've seen this in another clue)

I can't explain the remainder of the clue.

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(Other definitions for blockbuster that I've seen before include "Film or book making huge profits" , "Sort of film" , "best seller?" , "Landmine" , "Large and forceful film, person etc" .)

I've seen this clue in The Telegraph.
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