Maybe Oscar Wilde ate these when out to lunch (8)
I believe the answer is:
aesthete
'maybe oscar wilde' is the definition.
'ate these when out to lunch' is the wordplay.
'when out to lunch' indicates an anagram.
'ate'+'these'='atethese'
'atethese' anagrammed gives 'AESTHETE'.
(Other definitions for aesthete that I've seen before include "Arty type" , "professed lover of beauty" , "Person with great appreciation of the beautiful" , "Person seeing beauty in art" , "Person of refined taste" .)