Skipping or jumping when playing your music in the car is caused when the turntable is still locked. The springs supporting the table need room to allow the platter to move freely.
Oops, sorry, I just had a cool retro moment. Anyone remember this problem?
On the serious side, playing in the car is the key hint here: you’re connected via an accessory audio cable. The Clip will “skip” if there is a fault in one of the channels, as in an improperly seated plug, or a connection issue. This becomes more acute if the volume is set in the higher range. The output protection may be what you’re hearing.