Some paint one animal (5)
I believe the answer is:
coati
'animal' is the definition.
(I've seen this before)
'some paint one' is the wordplay.
'some paint' becomes 'coat' (I've seen this in other clues).
'one' becomes 'i' (Roman numeral).
'coat'+'i'='COATI'
(Other definitions for coati that I've seen before include "Furry animal" , "omnivorous mammal" , "Tropical animal" , "wild animal" , "American mammal related to raccoon" .)