Mean figure interrupting riotous din (6)
I believe the answer is:
intend
'mean' is the definition.
('intend' can be a synonym of 'mean')
'figure interrupting riotous din' is the wordplay.
'figure' becomes 'ten' (I've seen this in other clues**).
'interrupting' is an insertion indicator.
'riotous' is an anagram indicator.
'din' anagrammed gives 'ind'.
'ten' inserted into 'ind' is 'INTEND'.
(Other definitions for intend that I've seen before include "Purport" , "Mean (to do something)" , "Have as purpose or in mind" , "Have as purpose or resolve" , "Mean; aim" .)