We deliver subpoenas etc (those starting court action) (7)

I believe the answer is:

servers

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

'we deliver subpoenas etc those starting court' is the definition.
I can't tell whether this defines the answer.

'action' is the wordplay.
I cannot really understand how this works, but
'action' could be 'serve' (serve is a kind of action) and 'serve' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Independent.

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.