Possible Clues:

• Monkey puzzle tree
• * Song about goldfish (nearly)
• A right way for Romans to date the song of the tree
• Tree presenting problems for some of you
• Roots of any really admirable, unusual clue and reliably intriguing answer produce a puzzling growth
• Monkey puzzle tree - Guardian cryptic crossword setter
• Evergreen coniferous tree with stiff sharp leaves
• Monkey-puzzle genus
• Gold vehicle in song about coniferous tree
• Tree where golden road runner bursts into song