Crossword Genius

Flyer almost primeval in construction (7)

Ross

I believe the answer is:

vampire

I'm a little stuck... Click here to teach me more about this clue!

This could be a double definition.

'flyer' is the first definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'almost primeval in construction' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

Can you help me to learn more?

(Other definitions for vampire that I've seen before include "Nosferatu, for example" , "fabulous creature" , "It drinks the blood of the living by night" , "Dracula is one" , "eg Dracula" .)

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