Refrain from including an Eastern ancestor (8)
I believe the answer is:
forebear
'ancestor' is the definition.
(I know that ancestor can be written as forebear)
'refrain from including an eastern' is the wordplay.
I cannot really understand how this works, but
'from' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
'an' could be 'a' and 'a' is located in the answer.
'eastern' could be 'e' and 'e' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for forebear that I've seen before include "Person from whom you are descended" , "One of an earlier generation" , "Older relative" , "Ancestor" , "one from the past" .)