A dry area you can walk down (5)
I believe the answer is:
aisle
'can walk down' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'a dry area' is the wordplay.
'dry area' becomes 'isle' (I have seen 'Area of land' mean 'isle' so perhaps 'area' could also mean 'isle'. I am not sure about the 'dry' bit.).
'a'+'isle'='AISLE'
'you' acts as a link.
Can you help me to learn more?
(Other definitions for aisle that I've seen before include "Way between seat blocks" , "Church walkway" , "Passageway between seating areas" , "Extension of the nave in a church" , "The way to get married in church?" .)