Singing, spinning about first (9)
I believe the answer is:
carolling
'singing' is the definition.
(I have seen 'Seasonal singing ' mean 'carolling' so perhaps 'singing' could also mean 'carolling')
'spinning about first' is the wordplay.
'spinning' becomes 'rolling' (I can't explain this - if you can you should give a lot more credence to this answer).
'about' becomes 'ca' (abbreviation for 'circa').
'first' says to put letters next to each other.
'rolling' after 'ca' is 'CAROLLING'.
Can you help me to learn more?
(Other definitions for carolling that I've seen before include "A Christmas activity" , "Seasonal singing" , "Singing Christmas hymns" , "Singing at 7 across" .)