A pie's brownish colour? (5)
I believe the answer is:
sepia
'brownish colour?' is the definition.
(I've seen this before)
'a pie's' is the wordplay.
'a pie's' can be anagrammed to 'SEPIA'.
However, I am not sure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for sepia that I've seen before include "Dark reddish-brown pigment" , "Brown tone associated with old photographs" , "Rich reddish-brown colour" , "Old drawing" , "Reddish brown -- ie sap (anag)" .)