Clear and complicated dates listed (8)
I believe the answer is:
calendar
'dates listed' is the definition.
(I've seen this before)
'clear and complicated' is the wordplay.
'complicated' indicates an anagram (a complex or confusing ordering of the letters).
'clear'+'and'='clearand'
'clearand' is an anagram of 'CALENDAR'.
(Other definitions for calendar that I've seen before include "Date chart" , "that's stuffed with dates" , "Chart showing months and days" , "Table of days and dates" , "Almanac" .)