Novel character sporting tuxedo on QI (3,7)
I believe the answer is:
don quixote
'novel character' is the definition.
'don quixote' can be an answer for 'character' (Don Quixote is an example). I am unsure of the 'novel' bit.
'sporting tuxedo on qi' is the wordplay.
'sporting' is an anagram indicator.
'tuxedo'+'on'+'qi'='tuxedoonqi'
'tuxedoonqi' anagrammed gives 'DON QUIXOTE'.
Can you help me to learn more?
(Other definitions for don quixote that I've seen before include "chivalrous character" , "book" , "Novel" .)