Performances set in our dance (8)
I believe the answer is:
routines
'performances' is the definition.
(I know this)
'set in our dance' is the wordplay.
'dance' indicates an anagram.
'set'+'in'+'our'='setinour'
'setinour' with letters rearranged gives 'ROUTINES'.
(Other definitions for routines that I've seen before include "standard procedures" , "Regular and unvarying series of actions" , "Regular procedures - to rue sin (anag)" .)