Ringing senator, confused about name (8)
I believe the answer is:
resonant
'ringing' is the definition.
(I've seen this before)
'senator confused about name' is the wordplay.
'confused' indicates an anagram.
'about' is an insertion indicator.
'name' becomes 'n' (common abbreviation e.g. on forms).
'senator' is an anagram of 'resoant'.
'resoant' placed around 'n' is 'RESONANT'.
(Other definitions for resonant that I've seen before include "Deeply sounding" , "Evocative or ringing" , "Tending to reinforce sounds" , "(Of sound) deep, clear and continuing to ring" , "Resounding, ringing" .)