Noble champion and mate having a row (7)
I believe the answer is:
paladin
'noble champion' is the definition.
(type of medieval knight)
'mate having a row' is the wordplay.
'mate' becomes 'pal' (both can mean a friend).
'having' is a charade indicator (letters next to each other).
'row' becomes 'din' (both can mean a loud disturbance).
'pal'+'a'+'din'='PALADIN'
'and' acts as a link.
(Other definitions for paladin that I've seen before include "hero" , "Heroic knight - aid plan (anag)" , "Knightly champion" , "paragon" , "Chivalrous knight" .)