Book feature: 'Aim to do some decorating' (8)
I believe the answer is:
endpaper
'book feature' is the definition.
The definition suggests a singular noun which matches the answer.
'aim to do some decorating' is the wordplay.
I cannot really understand how this works, but
'aim' could be 'end' (both can mean a goal or purpose) and 'end' is found in the answer.
'do' could be 'ape' (both can mean to impersonate) and 'ape' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for endpaper that I've seen before include "found at beginning of book" , "part of book" , "goes into bookmaking?" , "One's stuck in a book" .)