Green’s Dictionary of Slang

cly n.

also clie, cligh
[? cly v.]
[late 17C–19C]

1. money.

2. (also cloy, clye) a pocket, also a purse or wallet.

In compounds

cly-faker (n.)

[early–mid-19C] a pickpocket; thus faking the cly, pickpocketing.