Garden spoilers (5)
I believe the answer is:
weeds
'garden spoilers' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for weeds that I've seen before include "Black garments once worn by widows" , "Are they worn by widows in the garden?" , "Unwanted plants" , "Wild plants; mourning garb" , "mourning clothes" .)