Related Clues:

• "Oh, crud!"
• Span a gap in material
• 'Oh, fudge'
• Caked filth
• "Fudge!" relative
• "Shucks!" alternative
• Caked-on buildup
• Stitch together something going around with dark lantern
• Mend (as a sock)
• "That ___ Cat" (Disney remake)
• Fix a sock hole
• 'Aw rats!'
• Fix, as holey socks
• Engine gunk
• Crusty buildup