Primarily inauspicious day, especially senatorially! (4)
I believe the answer is:
ides
'primarily inauspicious day especially senatorially' is the definition.
I can't judge whether this defines the answer.
'primarily inauspicious day especially senatorially' is the wordplay.
'primarily' says to take the initial letters.
The first letters of 'inauspicious day especially senatorially' is 'IDES'.
Can you help me to learn more?
(Other definitions for ides that I've seen before include "Unlucky day for Julius Caesar" , "For example, March 15 in the Roman calendar" , "day in Rome" , "13th or 15th day of the month in Roman calendar" , "Mid-month day in the Roman calendar" .)