0 a metal device attached to the wheel of an illegally parked car that will only be removed when the owner pays an amount of money:
1 to attach a wheel clamp (= a metal device that is removed when the owner pays money) to an illegally parked vehicle:
People whose vehicles had been wheel-clamped were commonly being forced to make on-the-spot cash payments.
Illegally-parked cars should be wheel-clamped as a last resort, and only for repeat offenders who do not pay fines.
It's a nationwide scheme to wheel-clamp and impound unlicensed vehicles.