Mammal, foxy dropping tail (5)
I believe the answer is:
shrew
'mammal' is the definition.
(shrew is a kind of mammal)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for shrew that I've seen before include "Virago" , "Insectivorous mammal" , "difficult woman" , "Insectivore - Katharina" , "Mouse-like animal or scolding woman" .)