Yielding one in factory (6)
I believe the answer is:
pliant
'yielding' is the definition.
(I've seen this in another clue)
'one in factory' is the wordplay.
'one' becomes 'i' (Roman numeral).
'in' indicates putting letters inside.
'factory' becomes 'plant' (a manufacturing plant).
'i' inserted within 'plant' is 'PLIANT'.
(Other definitions for pliant that I've seen before include "Adaptable" , "Bendable" , "Not firm" , "easily modified" , "Able to move supply" .)