Now and then, clues by Spinner certainly provided entertainment! (7)
I believe the answer is:
leisure
'entertainment' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'now and then clues by spinner certainly' is the wordplay.
'now and then' indicates alternate letters (letters taken on a regular basis, now and then).
'by spinner' becomes 'i' (I can't explain this - if you can you should give a lot more credence to this answer).
'certainly' becomes 'sure' (synonyms).
The alternating letters of 'clues' are 'le'.
'le'+'i'+'sure'='LEISURE'
'provided' is the link.
Can you help me to learn more?
(Other definitions for leisure that I've seen before include "Time available for ease and relaxation" , "R&R" , "Time away from work" , "Free time, comfort and convenience" , "Time for relaxation and pleasure" .)