Look! Bad smell in summerhouse (6)
I believe the answer is:
gazebo
'summerhouse' is the definition.
(I know that summerhouse can be written as gazebo)
'look bad smell' is the wordplay.
'look' becomes 'gaze' (gazing is a kind of looking).
'bad smell' becomes 'bo' (body odour).
'gaze'+'bo'='GAZEBO'
'in' is the link.
(Other definitions for gazebo that I've seen before include "Small garden building for shade and rest" , "Metrical feet" , "Summerhouse with a good view" , "Garden sumer-house with wide view" , "Kind of garden summerhouse with wide view" .)