A close relation? Do him in if misbehaving (7)
I believe the answer is:
hominid
'a close relation?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'do him in if misbehaving' is the wordplay.
'do him in' anagrams to 'HOMINID'.
But, I am not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for hominid that I've seen before include "Man or manlike creature" , "Old man" , "Man, including fossil types" , "Fossil human" , "Member of zoological family of humans and ancestors" .)