Old bread pursued by fine bird, relative of pheasant (6,4)
I believe the answer is:
guinea fowl
'relative of pheasant' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'old bread pursued by fine bird' is the wordplay.
'old bread' becomes 'guinea' (I can't justify this - if you can you should believe this answer much more).
'pursued by' says to put letters next to each other.
'fine' becomes 'f' (abbreviation e.g. condition of old coins, books).
'bird' becomes 'owl' (owl is a kind of bird).
'guinea'+'f'+'owl'='GUINEA-FOWL'
Can you help me to learn more?
(Other definitions for guinea fowl that I've seen before include "African game bird" , "African bird related to the pheasant" .)