Tricky clues he'd plan (8)
I believe the answer is:
schedule
'plan' is the definition.
(schedule is a kind of plan)
'tricky clues he'd' is the wordplay.
'tricky' is an anagram indicator.
'clues'+'hed'='clueshed'
'clueshed' is an anagram of 'SCHEDULE'.
(Other definitions for schedule that I've seen before include "Timetable; plan of action" , "Rota" , "Timetable of planned events or work" , "Plan of times and events" , "You don't see loafers on this" .)