Craftiness (5)
I believe the answer is:
guile
'craftiness' is the definition.
(I know that craftiness can be written as guile)
This is the entire clue.
(Other definitions for guile that I've seen before include "Crafty behaviour" , "Craftiness" , "Cunning intelligence" , "Deceitful cunning" , "Artfulness, cunning" .)