Prop (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
stay
'prop' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stay that I've seen before include "Supporting rope; remain" , "Stick around" , "guy giving > support" , "Supporting rope or wire" , "Board; continue" .)