University representative broadcast in sound (10)
I believe the answer is:
unimpaired
'sound' is the definition.
(thesaurus)
'university representative broadcast' is the wordplay.
'university' becomes 'uni' (I've seen this in other clues).
'representative' becomes 'mp'.
'broadcast' becomes 'aired' ('aired' can be a synonym of 'broadcast').
'uni'+'mp'+'aired'='UNIMPAIRED'
'in' acts as a link.
(Other definitions for unimpaired that I've seen before include "Not weakened or damaged" , "none the worse for it?" .)