Brown shade as pie cooked (5)
I believe the answer is:
sepia
'brown shade' is the definition.
'sepia' can be an answer for 'brown' (I've seen this before). I'm not sure about the 'shade' bit.
'as pie cooked' is the wordplay.
'cooked' indicates anagramming the letters.
'as'+'pie'='aspie'
'aspie' with letters rearranged gives 'SEPIA'.
Can you help me to learn more?
(Other definitions for sepia that I've seen before include "Brown colour of old photo" , "A greyish brown" , "Reddish brown -- ie sap (anag)" , "cuttle" , "Brown tone associated with old photographs" .)