Racist buffoon regularly waving cross (9)
I believe the answer is:
fractious
'cross' is the definition.
(thesaurus)
'racist buffoon regularly waving' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'waving' is an anagram indicator (letters wave around).
The alternating letters of 'buffoon' are 'ufo'.
'racist'+'ufo'='racistufo'
'racistufo' with letters rearranged gives 'FRACTIOUS'.
(Other definitions for fractious that I've seen before include "Difficult to control; irritable" , "Grumpy" , "Easily irritated" , "Testy" , "Cross and quarrelsome" .)