The place for plain clothes men? (4)
I believe the answer is:
yard
This could be a double definition.
'the place' is the first definition.
The definition and answer can be both locations as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'plain clothes men?' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'for' is the link.
Can you help me to learn more?
(Other definitions for yard that I've seen before include "Old unit of length" , "Unit of length; enclosure" , "Measure - enclosed paved area" , "Dray (anag.)" , "compound" .)