Crossword Genius

Hash, a chow's chow? (4,9)

Ross

I believe the answer is:

dogs breakfast

I'm a little stuck... Click here to teach me more about this clue!

'hash' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'a chow's chow?' is the wordplay.
I cannot really understand how this works, but
'a' is present in the answer.
'chow?' could be 'dog' (chow is a kind of dog) and 'dog' 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 dogs breakfast that I've seen before include "Mess (food for Fido?)" , "Pig's ear" , "Hash?" , "A horrible mess" , "Complete mess" .)

I've seen this clue in The Times.
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