Eating nothing, it restricts her poorly dog (8,7)
I believe the answer is:
scottish terrier
'dog' is the definition.
(I know that Scottish Terrier is a type of dog)
'eating nothing it restricts her poorly' is the wordplay.
'eating' means one lot of letters goes inside another.
'nothing' becomes 'o' (looks like zero - 0).
'poorly' indicates anagramming the letters.
'it'+'restricts'+'her'='itrestrictsher'
'itrestrictsher' with letters rearranged gives 'scttishterrier'.
'o' put inside 'scttishterrier' is 'SCOTTISH TERRIER'.
(Another definition for scottish terrier that I've seen is " Breed of dog".)