Bluestocking's smuggled weapon (5)

I believe the answer is:

estoc

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

'smuggled weapon' is the definition.
The definition suggests a singular noun which matches the answer.

'bluestocking's' is the wordplay.
'ESTOC' is hidden in amongst the letters.
However, I am not sure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for estoc that I've seen before include "Small sticker" , "Stabbing sword" .)

I've seen this clue in The Times.

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.