Rascal gives a large article to animal (6)
I believe the answer is:
impala
'to animal' is the definition.
(I've seen this before)
'rascal gives a large article' is the wordplay.
I cannot quite understand how this works, but
'rascal' could be 'imp' (synonyms) and 'imp' is found in the answer.
'a' is found in the answer.
'large' could be 'l' (eg in clothes sizes) and 'l' is present in the answer.
'article' could be 'a' (the indefinite article in English) and 'a' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for impala that I've seen before include "Breed of antelope" , "African resident" , "Leaping antelope" , "Antelope with lyre-shaped horns" , "Graceful antelope" .)