Endangered mammal in police car (5)
I believe the answer is:
panda
I believe this clue is a double definition.
'endangered mammal' is the first definition.
(I've seen this before)
'police car' is the second definition.
(I've seen this before)
'in' is the link.
(Other definitions for panda that I've seen before include "Black-eyed animal" , "One bearlike" , "Bearcat" , "Raccoon-like animal" , "See 11" .)