Plastic factory covers island (6)
I believe the answer is:
pliant
'plastic' is the definition.
(I know that plastic can be written as pliant)
'factory covers island' is the wordplay.
'factory' becomes 'plant' (a manufacturing plant).
'covers' indicates putting letters inside.
'island' becomes 'i' (geographical abbreviation).
'plant' placed around 'i' is 'PLIANT'.
(Other definitions for pliant that I've seen before include "easily controlled" , "Supple or flexible" , "Flexible and easily manipulated" , "docile" , "Plastic" .)