He could play a wild Croat (5)
I believe the answer is:
actor
'he could play a' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'wild croat' is the wordplay.
'wild' is an anagram indicator.
'croat' with letters rearranged gives 'ACTOR'.
Can you help me to learn more?
(Other definitions for actor that I've seen before include "Luvvy" , "One with role" , "For example, Colman" , "Thespian, stage performer" , "one to take on roles" .)