Sweet treats one fed to black dog with no tail (8)
I believe the answer is:
biscotti
'sweet treats' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'one fed to black dog with no tail' is the wordplay.
I cannot really see how this works, but
'one' could be 'i' (Roman numeral) and 'i' is located in the answer.
'black' could be 'b' (abbreviation as in pencil classifications) and 'b' is present in the answer.
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for biscotti that I've seen is " Italian biscuit flavoured with almonds".)