It's nothing for a dog to consume tea! (5)
I believe the answer is:
pekoe
'tea' is the definition.
(pekoe is a kind of tea)
'it's nothing for a dog to consume' is the wordplay.
'it's nothing for' becomes 'o' (I can't justify this - if you can you should believe this answer much more).
'a dog' becomes 'peke' (short for Pekingese).
'to consume' indicates putting letters inside.
'o' going into 'peke' is 'PEKOE'.
Can you help me to learn more?
(Other definitions for pekoe that I've seen before include "High-quality black tea" , "Scented black tea" , "brew" , "Variety of black tea" , "Thin mark; run naked" .)