Small mammal with a long snout (5)
I believe the answer is:
shrew
'small mammal with a long snout' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for shrew that I've seen before include "Vixen" , "Mouse-like animal or scolding woman" , "Woman to be tamed?" , "Insectivore - Katharina" , "difficult woman" .)