Crossword Genius

Core (4)

Ross

'core' is the definition.
(thesaurus)

This is all the clue.

(Other definitions for bulk that I've seen before include "Amplitude" , "Volume or size" , "Mass of something large" , "Mass (eg for buying)" , "Great size; main part" .)

I've seen this clue in The Guardian and the King Feature Syndicate.
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