Reveal cartel originally took over to stop corruption (5,2,5)
I believe the answer is:
bring to light
'reveal' is the definition.
(I've seen this before)
'cartel originally took over to stop corruption' is the wordplay.
I cannot quite see how this works, but
'cartel' could be 'ring' (both can mean a criminal group) and 'ring' is found in the answer.
'over' could be 'o' (cricket abbreviation) and 'o' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for bring to light that I've seen before include "Reveal" , "Expose" , "what one might do with spill" , "Unearth" .)