Riding whip (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
crop
'riding whip' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for crop that I've seen before include "The yield, from cereals say" , "Season's produce" , "where bird food is temporarily stored?" , "Dock" , "Cut short the harvest" .)