Like a new business celebrity meeting organised workers quietly (5-2)
I believe the answer is:
start-up
'like a new business' is the definition.
(a start-up is a newly created business)
'celebrity meeting organised workers quietly' is the wordplay.
'celebrity' becomes 'star' (I've seen this before).
'meeting' says to put letters next to each other.
'organised workers' becomes 'TU' (abbreviation for trade union).
'quietly' becomes 'p' (p for piano and quiet).
'star'+'tu'+'p'='START-UP'
(Other definitions for start-up that I've seen before include "new business" , "Newly established business" , "launch?" , "new venture" .)