Sneaky (9)
'sneaky' is the definition.
(I know that sneaky can be written as underhand)
This is the entire clue.
(Other definitions for underhand that I've seen before include "way of delivering service." , "Unsporting" , "Crafty" , "Done in sly or secret way" , "done deviously through cover" .)
'sneaky' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sly that I've seen before include "'Cunning, wily (3)'" , "Devious, cunning" , "Doing things in unpleasant and secret way" , "Cunning; surreptitious" , "Sneaky" .)