Point rapidly out that it's a lot to eat (5)
I believe the answer is:
feast
'to eat' is the definition.
(feasting is a kind of eating)
'point rapidly out' is the wordplay.
'point' becomes 'E' (compass point).
'rapidly' becomes 'fast' (synonyms).
'out' is an insertion indicator.
'e' inserted within 'fast' is 'FEAST'.
'that it's a lot' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for feast that I've seen before include "Belshazzar's party" , "Lavish meal" , "wine and dine" , "Saint's day, for example" , "entertainment" .)