Related Clues:

• White shirt woes
• Some shapes on lab slides
• Ill-defined shapes
• Amoebas, basically
• Marks & Spenser talk about introducing new stores initially
• Marks left by spills
• Spots to remove
• Spots small containers keeping ale's head
• Shapeless jelly-like forms
• Dry cleaners' challenges
• Wood coats
• Leaves a lasting mark
• Spots from a food fight
• Spots yours truly wearing leather on board ship
• Inkblots on shirts, for example