Changed the colour of fabric (4)
I believe the answer is:
dyed
'changed the colour of fabric' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for dyed that I've seen before include "Stained with a new colour" , "Cloth is often" , "Given a new colour" , "Changed to a new colour" , "(Of fabric) coloured" .)