Manx or Persian (3)
I believe the answer is:
cat
I believe this is a double definition.
'manx' is the first definition.
(I've seen this in another clue)
'persian' is the second definition.
(breed of cat)
(Other definitions for cat that I've seen before include "one's pyjamas? They're an excellent thing" , "See 21" , "Tiger, for instance" , "Eg, tiger, lion" , "Tabby" .)