Dance of an uncertain period (5)
I believe the answer is:
limbo
I believe this clue is a double definition.
'dance' is the first definition.
(I've seen this before)
'an uncertain period' is the second definition.
(I've seen this before)
'of' acts as a link.
(Other definitions for limbo that I've seen before include "State of unceratinty" , "Place of suspense" , "Waiting state; Caribbean dance" , "State of waiting in uncertainty" , "Dance; uncertain period of waiting" .)