Richard Wagner ultimately a person creating a buzz (5)
I believe the answer is:
drone
'a buzz' is the definition.
(thesaurus)
'richard wagner ultimately a person' is the wordplay.
'ultimately' indicates one should take the final letters.
'a person' becomes 'one'.
The final letters of 'richard wagner' are 'dr'.
'dr'+'one'='DRONE'
'creating' acts as a link.
(Other definitions for drone that I've seen before include "Hum; monotonous talk" , "Queen bee1s mate" , "boring speaker" , "Male honey bee - hum" , "fine lady?" .)