Profiteer has no problem in case of uproar (6)
I believe the answer is:
usurer
'profiteer' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe there's an association between them I don't understand?
'no problem in case of uproar' is the wordplay.
'no problem' becomes 'sure' (I've seen this in another clue).
'in' means one lot of letters goes inside another.
'case of' suggests removing the centre (like emptying a case).
'uproar' with its centre removed is 'ur'.
'sure' inserted within 'ur' is 'USURER'.
'has' acts as a link.
Can you help me to learn more?
(Other definitions for usurer that I've seen before include "Former name for money-lender" , "Lender at an exorbitant rate" , "Grasping money lender" , "Grasping money-lender" , "Loan shark" .)