Crossword Genius

Publicise, year upon year, entertainment of a delicate nature (4-5)

Ross

I believe the answer is:

'of a delicate nature' is the definition.
(both can mean fancy or elegant)

'publicise year upon year entertainment' is the wordplay.
'publicise' becomes 'air' (airing is a kind of publicising).
'year' becomes 'y'.
'upon' says to put letters next to each other.
'year' becomes 'y'.
'entertainment' becomes 'fair' (as in a fun fair).
'y' put after 'fair' is 'fairy'.
'air'+'y'+'fairy'='AIRY-FAIRY'

(Other definitions for airy-fairy that I've seen before include "Fanciful and impractical like breezy sprite", "Unrealistic - fanciful", "Fanciful, not based on reality", "Lightweight", "Fanciful or impractical for breezy elf".)

I've seen this clue in The Times.