Dean's works are so absurdly racialist (9)
I believe the answer is:
satirical
'dean's works are so' is the definition.
(Jonathan Swift wrote satires and was also a dean)
'absurdly racialist' is the wordplay.
'absurdly' indicates anagramming the letters (I've seen this in other clues).
'racialist' is an anagram of 'SATIRICAL'.
(Other definitions for satirical that I've seen before include "Ridiculing" , "taunting?" , "scornful" , "of burlesque" , "Exposing human folly to ridicule" .)