Dead body found in the garden (4,5)
I believe the answer is:
cold frame
'the garden' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'dead body' is the wordplay.
'dead' becomes 'cold' (similar in meaning).
'body' becomes 'frame' (frame is a kind of body).
'cold'+'frame'='COLD FRAME'
'found in' acts as a link.
Can you help me to learn more?
(Another definition for cold frame that I've seen is " Nursery provision".)