The most common and most likely answer to this crossword clue is the 4 plus 4 letter word MATA HARI
I've seen this crossword clue in The Daily Telegraph
M
A
T
A
H
A
R
I
More clues leading to the result MATA HARI
- American subject not entirely uninteresting, having embraced a spy
- Dancing femme fatale that did harm essentially
- Receding hair, a hat, a muffler: disguise for spy
- Spy husband in Paris securing a revolutionary role
- Spy network endlessly stifling triumphant outburst
- Mother Teresa evacuated hospital — air disturbed Dutch courtesan
- Dancer has a hat perched up on untidy hair
- Spy Indian princess rejecting article without thanks
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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.