Related Clues:
- Build a third bedroom, say
- Extra publicity academic
- Provide something extra
- Extra-cost purchase
- Augment with
- Software module that enhances an existing application
- Charge hardware?
- Extra notice given to teacher
- Item with an extra cost
- Extra exhaust put in and modified
- Extra source of debts taken on by ace crime boss
- Extra option
- Software extension
- Aftermarket accessory