Possible Clues:

• It may be hazardous
• Sweat (anag.)
• Not be frugal
• Underutilize
• Refuse a cooked dish when weight's gone right up
• Useless leftovers
• Blow in middle of the ear
• 'Miss Brass ... opening the safe, brought from it a dreary -- of cold potatoes, looking as eatable as Stonehenge' (The Old Curiosity Shop)
• Discarded material
• Leavings