Possible Clues:

• It's back to the artist, although with us in the shrubbery (7)
• Evergreen tree or shrub with strawberry-like fruits
• Bush perhaps, American Republican, still American
• Shrub container artist overturned in front of us
• ...Bush, engulfed by war, but useless...
• Trailing ___ (type of shrub)
• Creeper with pink flowers
• One Roman assassin's head turned by something creepy in the garden
• Extract of poplar, but usually an evergreen tree
• An evergreen tree or shrub of a genus that includes the strawberry tree