Restrict food from ten to nine, say, finishing at noon (6)
I believe the answer is:
ration
'restrict food' is the definition.
(as in rationing food)
'ten to nine say finishing at noon' is the wordplay.
'ten to nine say' becomes 'ratio' (10:9 is a ratio).
'finishing at' is a charade indicator (letters next to each other).
'noon' becomes 'n' (abbreviation).
'ratio'+'n'='RATION'
'from' is the link.
(Other definitions for ration that I've seen before include "Restrict the supply of" , "Limit, share" , "Fixed share" , "Helping" , "Restrict the consumption of something" .)