Woody shrub with large, sometimes globe-shaped, flower heads (9)
I believe the answer is:
hydrangea
(Other definitions for hydrangea that I've seen before include "Common garden plant" , "Flower you might find in garden hay, oddly" , "Shrubby plant with showy flowers" , "Garden flower - garden hay (anag)" , "Ornamental flowering shrub - handy gear (anag)" .)