Bird (black) wandering about (9)
I believe the answer is:
brambling
'bird' is the definition.
(brambling is a kind of bird)
'black wandering about' is the wordplay.
I cannot really understand how this works, but
'black' could be 'b' (as in pencil classifications) and 'b' is found in the answer.
'wandering' could be 'rambling' ('ramble' can be a synonym of 'wander') and 'rambling' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for brambling that I've seen before include "bird" , "berries" , "Type of finch" .)