Male servant (7)
(Other definitions for footman that I've seen before include "Liveried servant" , "Archaic servant dressed in livery" , "Liveried flunkey" .)
'male servant' 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" , "Top manservant of a posh household" , "Chief male household servant" , "Head servant of posh household" , "Top servant in posh household" .)