Crossword Genius

I am apt to be cheeky (11)

Ross

I believe the answer is:

impertinent

'cheeky' is the definition.
(thesaurus)

'i am apt' is the wordplay.
'i am' becomes 'im'.
'apt' becomes 'pertinent' ('pertinent' can be a synonym of 'apt').
'im'+'pertinent'='IMPERTINENT'

'to be' acts as a link.

(Other definitions for impertinent that I've seen before include "Rude" , "Showing little respect" , "of no relevance" , "Bold" , "Disrespectful" .)

I've seen this clue in The Telegraph and The Guardian.
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