D defs.my
Entry 2 senses Webster, 1913

Clicker

/klĭk'-ẽr/ · Click·er · IPA /ˈklɪkɚ/
01 n. One who stands before a shop door to invite people to buy.
  1. 1.
    One who stands before a shop door to invite people to buy.[Low, Eng.]
  2. 2.
    One who as has charge of the work of a companionship.(Print.)