Palindromic time (4)
I believe the answer is:
noon
'palindromic time' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for noon that I've seen before include "12 o'clock" , "Twelve o'clock in the day" , "Twelve o'clock, midday" , "High time of day?" , "The middle of the day" .)