Nothing, presumably, from Matthew on Grant (5)
I believe the answer is:
allot
'grant' is the definition.
(synonyms)
I don't understand the rest of the clue.
(Other definitions for allot that I've seen before include "Give as a share, or a task to be done" , "Assign (to someone)" , "Hand out" , "Apportion, share" , "grant" .)