To Lynch, for instance, in the stadium, a Mexican type of concern for the police (5,4)
I believe the answer is:
crime wave
'police' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for crime wave that I've seen before include "Surge in lawbreaking" , "series of offences" , "multitude of sins" , "Sudden rise in offences" , "Busy time for law" .)