Man organised the rodeo (8)
I believe the answer is:
theodore
'man' is the definition.
(I've seen this before)
'organised the rodeo' is the wordplay.
'organised' is an anagram indicator.
'the'+'rodeo'='therodeo'
'therodeo' with letters rearranged gives 'THEODORE'.
(Other definitions for theodore that I've seen before include "ex-president was named thus" , "... Roosevelt" , "Man" .)