Walker rose (7)
I believe the answer is:
rambler
I believe this is a double definition.
'walker' is the first definition.
(I know that Rambler is a type of walker)
'rose' is the second definition.
(I've seen this before)
(Other definitions for rambler that I've seen before include "Countryside walker" , "Kind of climbing rose" , "Country walker" , "Presumably one goes on" , "Rover" .)