Answer: CATSPAW

AnswerCrossword Clue
CATSPAWHe does another's dirty work.
catspawa light wind
CATSPAWPerson who's being used
CATSPAWDupe (and not a feline's foot, as you might expect)
CATSPAWOne used to serve another's purposes
CATSPAWPerson used by another to gain an end
CATSPAWLight breeze causing ripples
CATSPAWLight breeze
CATSPAWPuppet's cousin.
CATSPAWKnot used to hook a tackle.
CATSPAWAn unwitting tool.
CATSPAWPliable, gullible chap.
CATSPAWStooge
CATSPAWTool.
CATSPAWDupe.
CATSPAWUnwitting victim
CATSPAWOne being used
CATSPAWTool
CATSPAWPawn in another's game
CATSPAWOne manipulated by another
CATSPAWPuppet
CATSPAWPawn
CATSPAWDupe
CATSPAWPerson serving as a dupe