Wiktionary
n. (context idiomatic English) summons and control, in a position of servitude or as an attendant.
Usage examples of "beck and call".
Micah didn't mind having his own Fluxgirl at his beck and call as well as for his guide.
With the rumors spreading like wildfire, they could hardly contain the troops, yet they didn't want to fight on the enemy's turf and at the enemy's beck and call.
He was hoping to have a little fun before shipping off to the Federation Assembly where he would be at the beck and call of some ancient legislator for two months.
There are forces at my beck and call that you really don't wan to meet.
There were antihero superheroes, supermen with feet of clay, protagonists who not only didn't have the Gotham City or Metropolis police forces at their beck and call, but who were being actively pursued for imagined or trumped-up crimes.
Right now, you have a Starfleet engineering team at your beck and call.
The Fremen saw omens in everything, and ever since, Pardot Kynes had been provided with the resources of ten million Fremen at his beck and call.
This was placing me at the beck and call of about seventy-five men.
Tell me how you tracked that first killer all the way to Texas without any experienced man-hunters at your beck and call.