Plucky but unpleasant female? (5)

I believe the answer is:

harpy

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

'plucky but unpleasant female?' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Maybe they are linked in a way I don't understand?

This is all the clue.

Can you help me to learn more?

(Other definitions for harpy that I've seen before include "Ravenous monster -- nagging woman" , "Ferocious woman" , "Filthy beast" , "Greedy woman" , "Rapacious woman-bird" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.