Shed clue about timetable (8)
I believe the answer is:
schedule
'timetable' is the definition.
(I've seen this before)
'shed clue about' is the wordplay.
'about' is an anagram indicator.
'shed'+'clue'='shedclue'
'shedclue' is an anagram of 'SCHEDULE'.
(Other definitions for schedule that I've seen before include "List of times when things should happen" , "List of intended events and times" , "List of times and places for events" , "Plan of activities" , "Inventory - programme" .)