One functions mechanically in the part of Escamillo (3)

I believe the answer is:

cam

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

'one functions mechanically in' is the definition.
I can't judge whether this definition defines the answer.

'part of escamillo' is the wordplay.
'part of' indicates a hidden word.
'CAM' is hidden within 'escamillo'.

'the' is the link.

Can you help me to learn more?

(Other definitions for cam that I've seen before include "Eccentric contrivance" , "River of eastern England" , "Bump on a shaft for pushing another shaft" , "Rotating part in machine; river" , "Projection on rotating shaft imparting motion" .)

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.