Heavenly tiles Alec makes (9)
I believe the answer is:
celestial
'heavenly' is the definition.
(I know that heavenly can be written as celestial)
'tiles alec makes' is the wordplay.
'makes' indicates an anagram.
'tiles'+'alec'='tilesalec'
'tilesalec' anagrammed gives 'CELESTIAL'.
(Other definitions for celestial that I've seen before include "Relating to the heavens" , "Heavenly" .)