The most common and most likely answer to this crossword clue is the 11 letter word DRAUGHTSMAN
I've seen this crossword clue in The Guardian
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More clues leading to the result DRAUGHTSMAN
Buddy explains!

The straight part
We know that "One skilled in drawing" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one skilled in drawing = draughtsman.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 DRAUGHTSMAN mean?
DRAUGHTSMAN noun- A person skilled at drawing engineering or architectural plans.
- A book illustrator.
- A piece in the game of draughts (checkers).
- One who drinks drams; a tippler.