Turn up business for me (4)
I believe the answer is:
come
'turn up' is the definition.
(both can mean to arrive)
'business for me' is the wordplay.
'business' becomes 'co' (short for company).
'for' is a charade indicator (letters next to each other).
'co'+'me'='COME'
(Other definitions for come that I've seen before include "' - - fly with me'" , "Draw near" , "Arrive" , "Rude aggressive youth" , "Approach" .)