Magazine business means to make sound projection (5)
I believe the answer is:
comic
'magazine' is the definition.
(comic is a kind of magazine)
'business means to make sound projection' is the wordplay.
I cannot quite understand how this works, but
'business' could be 'co' (short for company) and 'co' is present in the answer.
The remaining letters 'mic' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for comic that I've seen before include "Comedian - humorous - children''s magazine" , "Funny man, often stand-up" , "Children's publication" , "Child's magazine" , "Raising mirth" .)