Mob's coup plea concocted (8)
I believe the answer is:
populace
'mob's' is the definition.
(thesaurus)
'coup plea concocted' is the wordplay.
'concocted' indicates anagramming the letters.
'coup'+'plea'='coupplea'
'coupplea' anagrammed gives 'POPULACE'.
(Other definitions for populace that I've seen before include "Citizens" , "People generally" , "General public" , "Residents" , "Common people" .)