. . . for each bygone actor? (9)
I believe the answer is:
performer
'actor?' is the definition.
(actor is a kind of performer)
'for each bygone' is the wordplay.
'for each' becomes 'per' (I've seen this before).
'bygone' becomes 'former' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'per'+'former'='PERFORMER'
Can you help me to learn more?
(Other definitions for performer that I've seen before include "Thespian" , "star?" , "Entertainer" , "Eg 9 [ACTRESS]" , "clown possibly" .)