Witches' longing (4)

I believe the answer is:

itch

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

'longing' is the definition.
(itch can mean a desire or longing)

'witches'' is the wordplay.
'ITCH' is hidden within the letters.
However, I am not sure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for itch that I've seen before include "Seven-yearly desire" , "following seven years in union?" , "Irritating feeling on the skin" , "Slight irritation" , "Hankering" .)

I've seen this clue in The Mirror.

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.