Crossword Genius

Suggestive, nothing unknown (7)

Ross

I believe the answer is:

naughty

'suggestive' is the definition.
(thesaurus)

'nothing unknown' is the wordplay.
'nothing' becomes 'naught' (synonyms).
'unknown' becomes 'y' (algebra).
'naught'+'y'='NAUGHTY'

(Other definitions for naughty that I've seen before include "Badly behaved, child say" , "Mischievous - improper" , "Badly-behaved" , "Badly behaved, mischievous" , "Dubious" .)

I've seen this clue in The Hindu.
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