Chief manservant (6)
I believe the answer is:
butler
'chief manservant' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for butler that I've seen before include "House servant" , "Lofty head servant - what did he see?" , "Head manservant of posh household" , "Samuel -, author of Erewhon" , "Head male servant" .)