Possible Clues:

• __ palm
• Asian palm, or its nut
• ___ nut (narcotic Asian leaf)
• Stimulant-yielding leaf
• Chewed leaf
• Dried leaf of a plant chewed in Asia as a mild stimulant
• Palm with nuts mentioned in the 'South Pacific' song 'Bloody Mary'
• Asian plant with chewable leaves
• Asian climber in risky venture left without energy
• Plant related to the pepper, whose leaves are chewed as a stimulant