Lech dudes in a tizzy slated (9)
I believe the answer is:
scheduled
'slated' is the definition.
(thesaurus)
'lech dudes in a tizzy' is the wordplay.
'in a tizzy' indicates an anagram (being in a tizzy is being confused).
'lech'+'dudes'='lechdudes'
'lechdudes' is an anagram of 'SCHEDULED'.
(Other definitions for scheduled that I've seen before include "Arranged, planned" , "Planned to occur" .)