Plant stylish hedge (7)
I believe the answer is:
install
'plant' is the definition.
'stylish hedge' is the wordplay.
'stylish' becomes 'in'.
'hedge' becomes 'stall' (I've seen this before).
'in'+'stall'='INSTALL'
(Other definitions for install that I've seen before include "Load up" , "Set in place" , "Put in - invest" , "Station" , "place in office" .)