If your license has been D-6, then yes, you will need a D-6 clearance prior to getting your license reinstated. Some counties offer payment plans so that you can get your license back without paying the entire amount that you owe off.
A d6 clearance is issued by the DMV when your license is in good standing. It allows you to drive. Some clerks allow you to set up payment plans to allow the d6 clearance to be issued as soon as you start paying. But if you miss a payment, it is revoked again.