Possible Clues:

• (Dishonourably gained) money (poetic, literary)
• If it's filthy, it may be money
• Filthy ___ (riches)
• What a filthy, cruel ulcer! And all for money
• Filthy - - (money)
• Sinister cult has locked up its riches
• It's filthy to entice without a small coin
• Religious sect practically raised on money
• Sordid gain from cruel manipulation
• Temptation to conceal clubs' profits