The term 'very slim margin' can be represented by three crossword solutions: 'EYELASH', 'HAIR', and 'NOSE'. An EYELASH is a thin strand of HAIR that grows at the edge of the eyelid. HAIR is a filamentous biomaterial that grows from follicles found in the dermis. The NOSE is a protruding organ on the face that helps with breathing, smelling, and facial recognition. All three of these items have very slim margins, making them appropriate solutions for the term.