Branch office's first dance (5)
I believe the answer is:
limbo
'dance' is the definition.
(I've seen this before)
'branch office's first' is the wordplay.
'branch' becomes 'limb' (I've seen this before).
'first' indicates taking the first letters.
The first letter of 'offices' is 'o'.
'limb'+'o'='LIMBO'
(Other definitions for limbo that I've seen before include "Intermediate state; obscurity" , "nowhere in particular" , "Unsettled state" , "Period of indecision" , "State of being disregarded or forgotten" .)