Possible Clues:

• Rubber-like latex
• Highly resistant substance obtained from latex of various Malaysian trees
• Spill tea under breadbasket? Some insulation, perhaps, provided
• Rubberlike gum used as a dental cement
• Caught out hoarding narrow material now superseded by plastic
• Fillet a fish, say, on a tough, rubbery substance
• Golf-ball material, once
• Tree caught in storm getting to die away inside
• Whitish rubber substance, something that is balanced on furrow first, say
• Possibly, one sitting on kerb said it's tough