Person drawing main rota is organised (8)
I believe the answer is:
animator
'person drawing' is the definition.
(a person who draws)
'main rota is organised' is the wordplay.
'is organised' is an anagram indicator.
'main'+'rota'='mainrota'
'mainrota' is an anagram of 'ANIMATOR'.
(Other definitions for animator that I've seen before include "Cartoon film artist" , "Walt Disney, perhaps?" , "Cartoon maker" , "Cartoon creator" , "Disney maybe" .)