Capital put on entertaining round dance (8)
I believe the answer is:
rigadoon
'entertaining round dance' is the definition.
'rigadoon' can be an answer for 'dance' (I've seen this before). I am not sure about the 'entertaining round' bit.
'capital put on' is the wordplay.
'capital' becomes 'Riga' (capital of Latvia).
'put' becomes 'do' (I can't explain this - if you can you should give a lot more credence to this answer).
'riga'+'do'+'on'='RIGADOON'
Can you help me to learn more?
(Other definitions for rigadoon that I've seen before include "dance music" , "Old dance" .)