A roll or just crumbs may be on it for the birds (5)

I believe the answer is:
table
'a roll' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for table that I've seen before include "Food; flat gem surface" , "Array of data" , "Set of figures in columns" , "Board for meals" , "put forward for consideration" .)
