Possible Clues:

• Gear for don in a mess -- feature of top flat?
• Forgo changes by the Bard's forest making an elevated plot
• Joey crushed fag end outside Queen's penthouse terrace
• A lot above your head
• On top of block, one may be blooming high!
• Jumper initially flirting with awful danger here?
• One of those mouthy types creates danger for the top-level Greens
• Area for urban growth
• Place for an urban veggie patch
• Urban agriculture establishment