Possible Clues:

• It won't flourish without support
• Shoot head gardener's product
• Messenger finds 2 down is part of the plot
• Messenger finds short comic is a little green in the development stage and requires support
• Athlete comes to Scottish peak, having eaten a bit of food
• The Messenger and Beano, for the most part, is a little green in the development stage and requires support
• Fast pulse?
• Veggie whose plant is grown in English gardens as an ornamental
• Fugitive given loaf and vegetable