The most common and most likely answer to this crossword clue is the 8 plus 3 letter word MOSQUITO NET
I've seen this crossword clue in The Daily Telegraph
M
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More clues leading to the result MOSQUITO NET
- Southern capital captured by artist, very fine thing
- Protective curtain, very large, left in artist’s possession
- Fine lifesaver having stepped down, one in the majority
- No-fly zone confines artist touring very big desert
- Stop individual wearing very protective screen
- Screen doctor’s left one tense
- Protective curtain, very large, left in artist's possession
- During test, question playing something fine and catchy?
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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.