Crossword Genius

Oscar Wilde thought that this was 'something wasted on the stupid' (5)

Ross

I believe the answer is:

irony

(Other definitions for irony that I've seen before include "Sarcastic use of praise" , "Use of words to imply the opposite of what they mean" , "Subtle humour" , "style of humour" , "type of discussion, originally" .)

I've seen this clue in The Guardian.
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