Possible Clues:

• Wood or iron on the outskirts of Canterbury
• Gas enshrouding battleground a symbol of death
• Louisiana's state tree (with ''bald'')
• One living in churchyard - extremely crazy urge
• Hollowed out chunky squash plant
• Gas over the battlefield, a mourning symbol
• Conifer
• Widely cultivated conifer
• Sounds as if for the island there's wood for the paper at last
• City limits urge to provide tree