Retainer
Retainer , noun
1.
One who, or that which, retains.
2.
One who is retained or kept in service; an attendant; an adherent; a hanger-on.
3.
Hence, a servant, not a domestic, but occasionally attending and wearing his master's livery. — Cowell
4.
(a) (Law) The act of a client by which he engages a lawyer or counselor to manage his cause.
(b)
(Law) The act of withholding what one has in his hands by virtue of some right.
(c)
(Law) A fee paid to engage a lawyer or counselor to maintain a cause, or to prevent his being employed by the opposing party in the case; -- called also retaining fee. — Bouvier
5.
The act of keeping dependents, or the state of being in dependence. — Bacon