He-cat, eh? Possibly (7)
I believe the answer is:
cheetah
'he-cat eh? possibly' is the definition.
I can't tell whether this defines the answer.
'he-cat eh? possibly' is the wordplay.
'possibly' indicates anagramming the letters.
'he'+'cat'+'eh'='hecateh'
'hecateh' is an anagram of 'CHEETAH'.
Can you help me to learn more?
(Other definitions for cheetah that I've seen before include "Fast-running cat" , "Beast" , "Swiftest mammal" , "Swift, spotted feline" , "Long-legged feline" .)