Related Clues:

• Prove useful
• Introduction to dirt?
• Engage in (as a campaign)
• Pro's pay
• Grab the tab
• Earnings
• Doctor's charge
• Retainer, e.g.
• Electrician's charge
• Extra charge
• Something to do as you go?
• Attorney's concern, among other things
• Working capital?
• Hourly pay
• Just deserts