Sneaky (9)
'sneaky' is the definition.
(synonyms)
This is all the 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" .)