Green’s Dictionary of Slang

sconce v.

[sconce n.2 ]

to defraud someone, e.g. a publican, of a payment; usu. as sconce the reckoning.

[UK]Merry Mercurie 14 July 9: A company of Scollars that had more wit than money, went to make merry at an Hosts house [...] with an intent to sconce him for the reckoning.
[UK]‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc. 155: ‘Sconce the reckoning,’ to go no farther in debt, but bolt.

In phrases