Days during prophet's Passover ritual (5)
I believe the answer is:
seder
'passover ritual' is the definition.
'seder' can be an answer for 'ritual' (I have seen 'religious ritual' mean 'seder' so perhaps 'ritual' could also mean 'seder'). I'm not certain of the 'passover' bit.
'days during prophet's' is the wordplay.
'days' becomes 'd' (abbreviation for days).
'during' is an insertion indicator.
'prophet' becomes 'seer' (I've seen this before).
'd' placed within 'seer' is 'SEDER'.
Can you help me to learn more?
(Other definitions for seder that I've seen before include "religious ceremony" , "Passover dinner" , "religious ritual" , "religious service" , "meal of religious significance" .)