What business makes: a small pie (8)
I believe the answer is:
turnover
'small pie' is the definition.
(eg apple turnover)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for turnover that I've seen before include "Business done" , "Total sales or rate of replenishment" , "Total value of sales" , "volume of business" , "Takings" .)