An anthropoid ape abandoning sick goat (6)
I believe the answer is:
angora
'goat' is the definition.
(Angora is an example)
'an anthropoid ape abandoning sick' is the wordplay.
'anthropoid ape' becomes 'gorilla' (gorilla is a kind of anthropoid ape).
'abandoning' is a deletion indicator.
'sick' becomes 'ill' ('ill' can be a synonym of 'sick').
'gorilla' with 'ill' removed is 'gora'.
'an'+'gora'='ANGORA'
(Other definitions for angora that I've seen before include "Woolly" , "Cloth from the soft hair of a goat" , "Yarn or fabric from hair of goats or rabbits" , "Wool from hair of goats" , "Mohair wool" .)