Possible Clues:

• Plant with clover-like leaves
• Three-leaved plant
• Clover-like plant
• 'The shamrock, for one, will do for fencing at last (7)'
• Ornament used for tile design
• Girl Scout emblem
• Leaf divided into three sections
• It has clover-like leaves
• Loftier (anag)
• Girl Scouts' cloverleaf emblem (... letters 4-7)