The most common and most likely answer to this crossword clue is the 10 letter word BRUNET[T]E
B
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U
N
E
T
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E
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The straight part
We know that "Dark-haired" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dark-haired = brunet[t]e.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 BRUNET[T]E mean?
BRUNET[T]E noun- A person, especially female, with brown or black hair and, often, dark eyes and darkish or olive skin.
- (of hair, eyes, skin, etc.) of a dark color or tone.
- (of a person) having brown or black hair and, often, dark eyes and darkish or olive skin.