TACKLE,
a Mistress; also good Cloaths. The Cull has tipt his Tackle Rum-rigging, or has tipt his Bloss Rum Tackle; The keeping Coxcomb has given his Mistress very fine Cloaths.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
Tackle in the 1811 Vulgar Tongue
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).