Dance round under branch (5)
I believe the answer is:
limbo
'dance' is the definition.
(type of dance)
'round under branch' is the wordplay.
'round' becomes 'o' (o is a circular letter).
'under' means one lot of letters go next to another (below, in a down clue).
'branch' becomes 'limb' (I've seen this in other clues).
'o' put after 'limb' is 'LIMBO'.
(Other definitions for limbo that I've seen before include "Uncertain time awaiting decision" , "(Under bar) dance" , "Place of uncertain waiting" , "Former state as for unbaptised souls" , "West Indian pole dancing" .)