You may like a nip from this dog (5,7)
I believe the answer is:
saint bernard
'you may like a nip from this dog' is the definition.
'Saint Bernard' can be an answer for 'dog' (Saint Bernard is an example). I'm not sure about the remainder of the definition.
'a nip from this dog' is the wordplay.
I cannot really see how this works, but
'a' is within the answer.
'from' could be 'in' (I've seen this in other clues) and 'in' is found within the answer.
'dog' could be 'stbernard' (St Bernard is an example) and 'stbernard' is found in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for saint bernard that I've seen before include "Alpine breed of dog" , "Large breed of dog" .)