Getting whiter fence-piece? (6)
I believe the answer is:
paling
'getting whiter' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for paling that I've seen before include "Fence made of stakes" , "Barrier of stakes" , "is becoming whiter" , "Fence post - turning white" .)