Removed top piece of wood that was dark brown (5)
I believe the answer is:
umber
'dark brown' is the definition.
(I've seen this in another clue)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for umber that I've seen before include "Yellowish-brown pigment" , "Natural colouring matter, dark brown" , "Natural pigment" , "Dark to reddish brown" , "Earthy colour" .)