The most common and most likely answer to this crossword clue is the 10 letter word CULTIVATED
I've seen this crossword clue in The Daily Telegraph
C
U
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T
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More clues leading to the result CULTIVATED
Buddy explains!

The straight part
We know that "Urbane" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case urbane = cultivated.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does CULTIVATED mean?
CULTIVATED verb- To grow plants, notably crops
- To nurture; to foster; to tend.
- To turn or stir soil in preparation for planting.
- (of a person) cultured, refined, educated
- (of a plant) grown by cultivation (not wild)
- (of land) farmed