Green’s Dictionary of Slang

cleyme n.

also clyme, cleymans
[ety. unknown; Partridge suggests a Cockney pron. of SE claim, i.e. a ’claim on one’s pity’]

(UK Und.) an artificial sore or wound, as placed on the body by a variety of mendicant villains; thus as v., to place an artificial sore/wound.

[UK]Dekker O per se O M: [They have] bodies of soares (which they call their great Cleymes). [Ibid.] O3: This cuffin, getting glimmer / I’ th’ prat, so cleymed his jockey.
[Ire]Head Eng. Rogue I 36: A health went round to the Prince of Maunders [...] a fourth to the Earl of Clymes.
[Ire]Head Canting Academy (2nd edn) 50: Begging in the fields with Clymes or artificial Sores.
[UK]R. Holme Academy of Armory Ch. iii item 68c: Canting Terms used by Beggars, Vagabonds, Cheaters, Cripples and Bedlams. [...] Cleymes, sores on the body.
[UK]B.E. Dict. Canting Crew n.p.: Cleymes, sores without Pain raised on Beggers Bodies, by their own Artifice and cunning, (to move charity) by bruising Crows-foot, Speerwort, and Salt together, and clapping them on the Place, which frets the Skin, then with a Linnenrag, which sticks close to it; they tear off the Skin, and strew on it a little Powder’d Arsnick, which makes it look angrily or ill favoredly, as if it were a real Sore.
[UK]New Canting Dict.
[UK]Bailey Universal Etym. Eng. Dict.
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[US]Matsell Vocabulum 19: cleymans Artificial sores made by beggars to impose on the credulous.
[UK]B.M. Carew Life and Adventures.
[US]Trumble Sl. Dict. (1890) 11: Cleymans. Artificial sores made by beggars.

In derivatives

cleyman (n.)

(Aus. und.) a beggar who uses fake sores to appeal for alms.

[Aus]Crowe Aus. Sl. Dict. 18: Cleymans, beggars with artificial sores.