Spinning Jenny, to me, is fun (9)
I believe the answer is:
enjoyment
'is fun' is the definition.
(thesaurus)
'spinning jenny to me' is the wordplay.
'spinning' indicates an anagram.
'jenny'+'to'+'me'='jennytome'
'jennytome' with letters rearranged gives 'ENJOYMENT'.
(Other definitions for enjoyment that I've seen before include "Delight" , "Gusto" , "Happiness" , "The pleasure felt when having a good time" , "Taking pleasure in something" .)