Crossword Genius

Exclude its coarse variant (9)

Ross

I believe the answer is:

ostracise

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'exclude' is the definition.
(I know that ostracise is a more specific form of exclude)

'its coarse variant' is the wordplay.
'its coarse' anagrams to 'OSTRACISE'.
However, I'm not clear how this is indicated.

Can you help me to learn more?

(Other definitions for ostracise that I've seen before include "Shun, exclude" , "bar" , "Blackball, send to Coventry" , "Cast out, send to Coventry" , "Cast out, blackball" .)

I've seen this clue in The Daily Express.
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