Rioted madly at the east end of Motown (7)
I believe the answer is:
detroit
'motown' is the definition.
(I've seen this before)
'rioted madly at the east end' is the wordplay.
'madly' indicates an anagram.
'the east end' suggests the final letters (the letter on the right or east end of the word).
The final letter of 'at' is 't'.
'rioted' is an anagram of 'detroi'.
'detroi'+'t'='DETROIT'
'of' is the link.
(Other definitions for detroit that I've seen before include "American city" , "Michigan car city" , "city by a Great Lake" , "Where cars are made" , "City also called Mo'town in USA" .)