Bit of cunning (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
wile
'bit of cunning' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for wile that I've seen before include "Cunning ruse" , "Coax - pleasing artifice" , "Chicanery" , "Artfulness" , "Trick, stratagem" .)