Monstrous woman inside gets the nod (6)

I believe the answer is:

stheno

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

'monstrous woman' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'inside gets the nod' is the wordplay.
'inside' says the answer is hidden in the clue.
'STHENO' is hidden within 'gets the nod'.

Can you help me to learn more?

(Another definition for stheno that I've seen is " Petrifying female".)

I've seen this clue in The Guardian.

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.