Feature of birds boy attendant spotted round Angus’s chimney (7)
I believe the answer is:
plumage
'feature of birds' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'attendant spotted round angus's chimney' is the wordplay.
I cannot really understand how this works, but
'chimney' could be 'lum' (Scottish word for a chimney) and 'lum' is present in the answer.
'attendant' could be 'page' (page is a kind of attendant) and 'page' is present in the leftover letters.
No letters remain.
This explanation may well be incorrect...
'boy' is the link.
Can you help me to learn more?
(Other definitions for plumage that I've seen before include "coat" , "Bird's covering of feathers" , "Birds' clothing" , "One's feathers" , "A bird's feathers, may be fancy" .)