Roles can be said to put bread in people's mouths (5)
I believe the answer is:
rolls
'roles can be said to' is the definition.
I can't judge whether this definition defines the answer.
'bread in people's mouths' is the wordplay.
'bread' becomes 'roll' (roll is a kind of bread).
'in people's mouths' becomes 's' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'roll'+'s'='ROLLS'
'put' acts as a link.
Can you help me to learn more?
(Other definitions for rolls that I've seen before include "documents" , "Small rounded bread pieces" , "Baps - nice car" , "Bread portions" , "Luxury car - lists of names" .)