Related Clues:

• Corruption
• Byproduct of elbow grease, perhaps
• Wade through mud, e.g.
• Plod
• Sauna output
• Walk wearily
• ''USA, USA, USA ...''
• One side of strike negotiations
• Intone
• Fret over, slangily
• Underground Railroad user
• ''Amistad'' extra
• Walk with difficulty
• Strike-negotiation faction
• Long march