Awfully gaunt or an endangered great ape (9)
I believe the answer is:
orangutan
'endangered great ape' is the definition.
'orangutan' can be an answer for 'ape' (orangutan is a kind of ape). I also know that 'endangered' relates to this answer.
'awfully gaunt or an' is the wordplay.
'awfully' indicates an anagram.
'gaunt'+'or'='gauntor'
'gauntor' is an anagram of 'orangut'.
'orangut'+'an'='ORANGUTAN'
Can you help me to learn more?
(Other definitions for orangutan that I've seen before include "a big sub-human creature" , "ape" , "Primate" .)