This cat is said to be a stray (5)
I believe the answer is:
alley
'this cat is said to be a stray' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for alley that I've seen before include "Back lane" , "Narrow passage" , "Marble" , "Bowling lane" , "Passage between houses, perhaps" .)