Machines press oranges to extrude drink (8)

I believe the answer is:

espresso

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

'drink' is the definition.
(espresso is a kind of drink)

'machines press oranges to extrude' is the wordplay.
'ESPRESSO' is hidden within the letters.
But, I'm uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for espresso that I've seen before include "strong drink" , "Italian-style coffee" , "Kind of shot" , "This may keep someone awake!" , "that's stimulating" .)

I've seen this clue in The Irish Times.

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