Easily swayed unit in factory (6)
I believe the answer is:
pliant
'easily swayed' is the definition.
(I've seen this in another clue)
'unit in factory' is the wordplay.
'unit' becomes 'I' (synonyms).
'in' is an insertion indicator.
'factory' becomes 'plant' (I've seen this in other clues).
'i' placed within 'plant' is 'PLIANT'.
(Other definitions for pliant that I've seen before include "Bending easily" , "Flexible, easy to bend" , "easily controlled" , "Not firm" , "Flexible and easily manipulated" .)