From a town, and almost polite! (5)
I believe the answer is:
urban
'town and almost polite' is the definition.
I can't tell whether this defines the answer.
'from a' is the wordplay.
'from' becomes 'urb' (I can't explain this - if you can you should give a lot more credence to this answer).
'a' becomes 'an'.
'urb'+'an'='URBAN'
Can you help me to learn more?
(Other definitions for urban that I've seen before include "Had this description of town" , "Of towns or cities" , "Civic" , "Of or about city areas" , "Municipal" .)