The most common and most likely answer to this crossword clue is the 7 letter word MERMAID
M
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R
M
A
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D
More clues leading to the result MERMAID
- Fabulous girl in dream, I'm excited!
- In Ireland I am reminded about mythical creature
- Woman, originally, mariners admire at sea
- Mythical creature I rammed at sea?
- See me with jolly folk help female in Copenhagen
- In Riviera’s setting, one is right about fabulous girl
- Dream I’m dancing for legendary woman
- I'm armed to fight mythical swimmer
- Legendary female I dream about after end of film
- Christmas gift produced, we hear, for fabulous lady
Buddy explains!

The straight part
We know that "legendary woman" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case legendary woman = mermaid.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 MERMAID mean?
MERMAID noun- A mythological creature with a woman's head and upper body, and a tail of a fish.
- (as a modifier) Coloured a brilliant turquoise.
- A prostitute.