Guest at banquet missing starter -- when chocolate's on the menu? (6)
I believe the answer is:
easter
'guest at banquet missing starter' is the definition.
I can't tell whether this defines the answer.
'when chocolate's on the menu?' is the wordplay.
'when' becomes 'e' (I've seen this in other clues).
'chocolate's on the menu?' becomes 'aster' (I am not sure about this - if you are sure you should believe this answer much more).
'e'+'aster'='EASTER'
Can you help me to learn more?
(Other definitions for easter that I've seen before include "Egg-rolling time" , "- Day; - bunny" , "See art at this time of year" , "holiday time" , "Christian celebration of the Resurrection" .)