Claim wish turned out to be playful (9)
I believe the answer is:
whimsical
'playful' is the definition.
(thesaurus)
'claim wish turned out' is the wordplay.
'turned out' indicates an anagram (turn out can mean to organise).
'claim'+'wish'='claimwish'
'claimwish' is an anagram of 'WHIMSICAL'.
'to be' is the link.
(Other definitions for whimsical that I've seen before include "Quirky" , "Appealingly fanciful" , "Fanciful or playful" , "Capricious" , "Playfully quaint" .)