Wise man eating starter of delicious meal to celebrate special occasion (5)
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I believe the answer is:
seder
'meal to celebrate special occasion' is the definition.
I can't judge whether this defines the answer.
'wise man eating starter of delicious' is the wordplay.
'wise man' becomes 'seer' (I've seen this in other clues).
'eating' is an insertion indicator.
'starter of' suggests taking the first letters.
The first letter of 'delicious' is 'd'.
'seer' going around 'd' is 'SEDER'.
Can you help me to learn more?
(Other definitions for seder that I've seen before include "ceremonial meal" , "Jewish festival" , "religious ceremony" , "religious service" , "religious ritual" .)
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