Possible Clues:

• Tree surgeon's first answer after rejecting party
• Tropical tree that may produce most of resin
• Wood: a chunk hauled up
• Tree loggers discontented, wearing sheepish expression
• 'Kon-Tiki' raft material
• Crafting material
• Central American forest tree used to make floats, rafts, models etc
• Model making material
• Kon-Tiki makeup
• The tiniest bit