Great success (5)

I think it could be either:

Which length description are you looking for?:

smash

'great success' is the definition.
(thesaurus)

This is the entire clue.

(Other definitions for smash that I've seen before include "Break like a glass or cup" , "Wreck" , "Break completely" , "Shatter, break up" , "Hard tennis shot" .)

I've seen this clue in the Penny Press.

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