Look round, taking in baron's summerhouse (6)
I believe the answer is:
gazebo
'summerhouse' is the definition.
(synonyms)
'look round taking in baron's' is the wordplay.
'look' becomes 'gaze' (gaze is a kind of look).
'round taking in baron' becomes 'bo' (I am not sure about this - if you are sure you should believe this answer much more).
'gaze'+'bo'='GAZEBO'
(Other definitions for gazebo that I've seen before include "Garden viewpoint" , "Small garden house with a view" , "Kind of garden summerhouse with wide view" , "outhouse" , "Garden sumer-house with wide view" .)