Canny sort of girl? (5)
I believe the answer is:
nancy
'girl?' is the definition.
'canny sort' is the wordplay.
'sort' indicates anagramming the letters.
'canny' anagrammed gives 'NANCY'.
'of' acts as a link.
(Other definitions for nancy that I've seen before include "in Oliver?" , "Birthplace of Edmond de Goncourt" , "First woman to sit in the British House of Commons" , "No Man" , "Dickensian heroine" .)