Crossword Genius

Grin (5)

Ross

I think it could be either:

smirk

smile

'grin' is the definition.
(I know that smirk is a type of grin)

This is all the clue.

(Other definitions for smirk that I've seen before include "Simper" , "Smile scornfully" , "Appear smug" , "Complacent smile" , "Smug smile" .)

I've seen this clue in The Star Tribune, The Mirror, the LA Times, the Universal, the Evening Standard, the USA Today and the Penny Press.
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