Stooge; marionette (6)
I believe the answer is:
puppet
I believe this is a double definition.
'stooge' is the first definition.
(thesaurus)
'marionette' is the second definition.
(I know that marionette can be written as puppet)
(Other definitions for puppet that I've seen before include "Doll on a string or rod" , "Doll controlled by strings" , "eg Sooty; Petrushka" , "Pawn - marionette" , "Pinocchio, e.g." .)