Retainer /(?)/

Re·tain·er

Retainer

n.
  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.
  4. The act of a client by which he engages a lawyer or counselor to manage his cause. (Law)
  5. The act of keeping dependents, or the state of being in dependence.