The most common and most likely answer to this crossword clue is the 6 letter word GOBLIN
G
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More clues leading to the result GOBLIN
- Briefly stop seeing grotesque creature
- Almost become unable to see mischievous spirit
- Supernatural creature eatin’ greedily, do we hear?
- Troll trashed blog, popular
- Almost to lose sight creates unpleasant spirit
- Almost lose sight of evil sprite
- Gnome’s energy on screen died away
- Fiend eatin’ loudly
- Turn, almost unable to see mischievous imp
- Almost lose one’s sight seeing demon
Buddy explains!

The straight part
We know that "legendary creature" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case legendary creature = goblin.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 GOBLIN mean?
GOBLIN noun- One of various hostile supernatural creatures, now especially (fantasy literature) a malevolent and grotesque diminutive humanoid.