A dry area you can walk down (5)
I believe the answer is:
aisle
'you can walk down' is the definition.
I can't judge whether this definition defines the answer.
'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'
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?" .)