Surreptitious (11)
'surreptitious' is the definition.
(synonyms)
This is all the clue.
(Other definitions for underhand that I've seen before include "way of delivering service." , "In a secret or dishonest way" , "Crafty" , "Deceitful" , "done deviously through cover" .)
'surreptitious' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for furtive that I've seen before include "Skulking" , "Surreptitious" , "Clandestine" , "Stealthy; secret" , "Sly, underhand" .)
'surreptitious' is the definition.
(I know that surreptitious can be written as clandestine)
This is all the clue.
(Other definitions for clandestine that I've seen before include "Undercover" , "backroom" , "Private" , "Concealed" , "Surreptitious" .)