Crossword Genius

Rough number (5)

Ross

I believe the answer is:

gross

I believe this is a double definition.

'rough' is the first definition.
(thesaurus)

'number' is the second definition.
(gross is a kind of whole number)

(Other definitions for gross that I've seen before include "Vulgar, coarse" , "figure well over a ton" , "exclamation of disgust" , "Arrant" , "Earn" .)

I've seen this clue in The Globe and Mail.
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