Possible Clues:

• Fragile, of loose structure
• Lightweight insect is caught nipping maiden
• Frail insect eating a single document
• Not strong, but I am second in race
• The fly's not a bit thick around where I am
• I'm second in race -- not very strong at all
• Cheaply made
• Frail
• Lacking strength
• Light and thin, easily torn or broken