Polite construction worker? (5,8)
I believe the answer is:
civil engineer
'worker?' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'polite construction' is the wordplay.
'polite' becomes 'civil' (synonyms).
'construction' becomes 'engineer' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'civil'+'engineer'='CIVIL ENGINEER'
Can you help me to learn more?
(Other definitions for civil engineer that I've seen before include "Eg, road or bridge designer" , "Brunel, e.g." .)