The way of a townsman (6)
I believe the answer is:
street
'the way' is the definition.
(street is a kind of way)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for street that I've seen before include "Thoroughfare lined with buildings" , "Public road in a conurbation" , "City road" , "Town thoroughfare" , "Paved road" .)