King not overturning routine (10)
I believe the answer is:
charleston
'routine' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'king not overturning' is the wordplay.
'king' becomes 'charles' (King Charles I, II or III).
'overturning' says the letters should be written in reverse.
'not' in reverse letter order is 'ton'.
'charles'+'ton'='CHARLESTON'
Can you help me to learn more?
(Other definitions for charleston that I've seen before include "Lively dance - then carols (anag)" , "Town of South Carolina which gave its name to a 1920s dance craze" , "US city - 1920s' dance" , "American port" , "Dance making" .)