Greek character providing home for popular endangered species? (5)
I believe the answer is:
rhino
'endangered species?' is the definition.
(rhinoceroses are endangered)
'greek character providing home for popular' is the wordplay.
'greek character' becomes 'rho' (letter from the Greek alphabet).
'providing home for' is an insertion indicator.
'popular' becomes 'in' ('in' can mean trendy).
'rho' going around 'in' is 'RHINO'.
(Other definitions for rhino that I've seen before include "Dosh (slang)" , "one may charge unwary tourist?" , "thick-skinned creature" , "Horned pachyderm" , "one still charges in Africa" .)