Brother carrying lute playing for servant (6)
I believe the answer is:
butler
'servant' is the definition.
(butler is a kind of servant)
'brother carrying lute playing' is the wordplay.
'brother' becomes 'br'.
'carrying' means one lot of letters goes inside another.
'playing' indicates anagramming the letters.
'lute' is an anagram of 'utle'.
'br' enclosing 'utle' is 'BUTLER'.
'for' is the link.
(Other definitions for butler that I've seen before include "Valet" , "Top manservant of a posh household" , "Top servant in posh household" , "Samuel -, author of Erewhon" , "House servant" .)