Dance people occasionally central to Mikado (5)
I believe the answer is:
polka
'dance' is the definition.
(I know that polka is a more specific form of the action dance)
'people occasionally central to mikado' is the wordplay.
'occasionally' means one should take alternating letters (letters taken at regular intervals or occasions).
'central' says to take the centre.
The middle of 'mikado' is 'ka'.
The alternate letters of 'people' are 'pol'.
'pol'+'ka'='POLKA'
(Other definitions for polka that I've seen before include "Dance originally from part of 1 across" , "An originally Bohemian dance" , "Lively dance (but dotty?)" , "Dot may be associated with this" , "Dance in fast time with three steps and a hop" .)