Jesting, pull a fairy’s wings off (7)
I believe the answer is:
playful
'jesting' is the definition.
(thesaurus)
'pull a fairy's wings off' is the wordplay.
'wings' suggests removing the centre (the wings or edge letters of the word are used).
'off' is an anagram indicator.
'fairy' with its middle removed is 'fy'.
'pull'+'a'+'fy'='pullafy'
'pullafy' anagrammed gives 'PLAYFUL'.
(Other definitions for playful that I've seen before include "In high spirits" , "Frolicsome" , "Full of fun" , "Fun-loving" , "Frisky" .)