Early riser to turn up regularly revealing beer belly (8)
I believe the answer is:
cockerel
'regularly revealing beer belly' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'early riser to turn up' is the wordplay.
I cannot really see how this works, but
'turn up' could be 'cock' (I've seen this in other clues) and 'cock' is present 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 cockerel that I've seen before include "Young male bird" , "Farmyard bird" , "Given bird" , "Farm awakener" , "Young domestic male fowl" .)