retainer
noun
[ rɪˈteɪnə ]
• a thing that holds something in place.
• "a guitar string retainer"
• a fee paid in advance to someone, especially a barrister, in order to secure their services for use when required.
• "he's on a retainer as a consultant"
• a servant, especially one who has worked for a person or family for a long time.
• "faithful family retainers"
Similar:
attendant,
follower,
servant,
hireling,
hanger-on,
escort,
minion,
lackey,
flunkey,
vassal,
dependant,
domestic,
valet,
footman,