Ring round being pompous (7)
I believe the answer is:
orotund
'pompous' is the definition.
(thesaurus)
'ring round' is the wordplay.
'ring' becomes 'o'.
'round' becomes 'rotund' (I've seen this in other clues).
'o'+'rotund'='OROTUND'
'being' is the link.
(Other definitions for orotund that I've seen before include "Of speech, dignified and pompous" , "Full, round" , "Full in sound" , "Loud or pompous" , "Sonorous; pompous" .)