Going back, identify old man as one of our ancestors (6)
I believe the answer is:
apeman
'one of our ancestors' is the definition.
I can't tell whether this defines the answer.
'going back identify old man' is the wordplay.
'going back' says the letters should be written in reverse.
'identify' becomes 'name' (synonyms).
'old man' becomes 'pa' (both can mean someone's father).
'name'+'pa'='namepa'
'namepa' backwards is 'APEMAN'.
'as' acts as a link.
Can you help me to learn more?
(Other definitions for apeman that I've seen before include "Primitive figure" , "song by 4 [THE KINKS]" , "One of our extinct ancestors?" , "Neanderthal type?" , "Extinct primate" .)