Confused hour trapped in urban environment (6)

I believe the answer is:
thrown
'confused' is the definition.
(I've seen this in another clue)
'hour trapped in urban environment' is the wordplay.
'hour' becomes 'hr' (abbreviation).
'trapped in' means one lot of letters goes inside another.
'urban environment' becomes 'town' (I can't explain this - if you can you should give a lot more credence to this answer).
'hr' inserted within 'town' is 'THROWN'.
Can you help me to learn more?
(Other definitions for thrown that I've seen before include "given up intentionally" , "Disconcerted, confused" , "Defeated" , "Confused - cast" , "Having been projected through the air" .)
