Possible Clues:

• Um, after the French set fire to that tree?
• Flowering tree
• Plant offers work, rejecting old miners
• Poisonous tree bearing seed-pods and hanging clusters of yellow flowers
• Tree with drooping clusters of yellow blossoms
• The 'golden rain' tree
• 'Golden chain' tree
• Poisonous tree or shrub native to the Alps
• Flowering shrub or tree — burn alum (anag)
• Work with miners cutting top of oak tree