Possible Clues:

• Subject of a strike
• With 6-Down, yield a profit
• With 12-Down, spend much more than a fair price
• Foot the bill for raising containment of Barbary apes
• Wages: penny a year
• Money for work and play, reduced by pounds
• Every year, a year's earnings?
• Hand over dollars
• With 47 Down, scales for staff
• Financial reward