The most common and most likely answer to this crossword clue is the 6 letter word BURQAS
B
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A
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Buddy explains!
The straight part
We know that "loose outerwear" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case loose outerwear = burqas.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 BURQAS mean?
BURQAS noun- An Islamic garment that covers the whole body, which has a net screen covering the eyes so they cannot be seen, and is worn by women.
- A dress made from felt or karakul (the short curly fur of young lambs of the breed of that name), traditionally worn by men of the Caucasus region.