Small mammal (6)
(Other definitions for rabbit that I've seen before include "Bunny; chatter idly" , "Poor player" , "See 17" , "Fur; chatter (colloq.)" , "Waffle" .)
(Other definitions for rodent that I've seen before include "Rat perhaps" , "Placental mammal having a single pair of incisor, 'gnawing', teeth" , "Small gnawing mammal" , "Creature such as a rat" , "Mouse maybe" .)
'small mammal' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for weasel that I've seen before include "Sneaky person - small, long-necked carnivorous animal" , "Sly character" , "Stoat-like mammal - treacherous type" , "Proverbially deceitful mammal" , "Cowardly carnivore" .)
(Other definitions for stoat that I've seen before include "Provider of ermine" , "Ermine in summertime?" , "Member of the weasel family" , "European ermine" , "furry animal" .)
(Other definitions for shrew that I've seen before include "Virago" , "Little mammal; a scold" , "Long-nosed mammal" , "Shakespeare: 'The Taming of the ....'" , "Small mouselike mammal" .)
(Other definitions for vole that I've seen before include "Small mouse-like rodent" , "Small burrowing animal - love it" , "creature" , "Strange love for a rodent" , "A little rodent" .)
(Other definitions for hare that I've seen before include "animal running in fields" , "who often got stiff?" , "Sort of rabbit" , "Timid creature" , "may be electric!" .)