Trampled (4)
I believe the answer is:
trod
'trampled' is the definition.
('tread' can be a synonym of 'trample')
This is the entire clue.
(Other definitions for trod that I've seen before include "start making wine" , "Trudged, stepped" , "Walked (on something)" , "Pressed (something) down with the feet" , "Stepped heavily" .)