Speaking to richer ensemble (8)
I believe the answer is:
rhetoric
'speaking' is the definition.
(thesaurus)
'to richer ensemble' is the wordplay.
'ensemble' is an anagram indicator.
'to'+'richer'='toricher'
'toricher' anagrammed gives 'RHETORIC'.
(Other definitions for rhetoric that I've seen before include "Torchier kind of eloquent talk" , "Bombast - speechcraft" , "Torchier kind of colourful language" , "Impressive or exaggerated speech as in public" , "insincere stuff" .)