Business to intimidate two males held inside (8)
I believe the answer is:
commerce
'business' is the definition.
(I've seen this before)
'intimidate two males held inside' is the wordplay.
'intimidate two' becomes 'coerce' (I can't explain this - if you can you should believe this answer much more).
'males' becomes 'mm' (an abbreviation for male written twice).
'held inside' is an insertion indicator.
'coerce' placed around 'mm' is 'COMMERCE'.
'to' is the link.
Can you help me to learn more?
(Other definitions for commerce that I've seen before include "Traffic" , "Activity of buying and selling" , "Buying/selling activity" , "The buying and selling of goods and services" , "Trading exchanges" .)