Green’s Dictionary of Slang

(UK Und.) the gang member deputed to divide up the spoils fairly.

1725		New Canting Dict. n.p.: clicker [...] Among the Canters, used for the Person whom they instruct to divide their Spoils, and proportion to every one his Share.
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. 1725].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.