European hypocrisy dismissing new mammal (7)
I believe the answer is:
polecat
'mammal' is the definition.
(polecat is a kind of mammal)
'european hypocrisy dismissing new' is the wordplay.
'european' becomes 'pole' (Pole is an example).
'hypocrisy' becomes 'cant' (I've seen this before).
'dismissing' suggests deleting specific letters.
'new' becomes 'n'.
'cant' with 'n' removed is 'cat'.
'pole'+'cat'='POLECAT'
(Other definitions for polecat that I've seen before include "weaselly type" , "Weasel-like mammal" , "Beast related to weasel" , "Beast of weasel family" , "Smelly American mammal" .)