Groom; retinue (5)
I believe the answer is:
train
I believe this is a double definition.
'groom' is the first definition.
(I know that groom can be written as train)
'retinue' is the second definition.
(both can mean people following an important person)
(Other definitions for train that I've seen before include "Groom" , "Locomotive or part of bride's dress" , "Succession of carriages" , "Teach (someone) a skill" , "Coach, develop" .)