Filling as actor (3)
I believe the answer is:
ham
This clue could be a double definition.
'filling' is the first definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'actor' is the second definition.
(I know that ham is a type of actor)
'as' acts as a link.
Can you help me to learn more?
(Other definitions for ham that I've seen before include "Gammon" , "Food" , "Succulent meat or extravagant actor" , "Meat from a pig" , "A poor actor - overdoes it" .)