Dropped rubbish (6)
I believe the answer is:
litter
'dropped rubbish' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for litter that I've seen before include "Rubbish strewn about the streets" , "Carelessly dropped rubbish" , "Scatter rubbish around" , "dropped by louts?" , "New-born animals" .)