Related Clues:

• Slim student shown in poster
• South Bank potentially narrow
• Remote southern bank?
• Spare shillings taken by pawnbroker
• Narrow lake in poster
• Meagre usurer after shilling
• Like a Slim Jim
• Large in poster, and slim
• Delicate letter at first kept by source
• Slight student captured in poster
• Fine mess finally at bank perhaps
• Lean son overlooking bank, perhaps
• Scant capital in Santander bank
• Thin, willowy
• Attractively thin person posting letter with pounds inside