PC hurried off as some birds sang (9)

I believe the answer is:

chirruped

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

'some birds sang' is the definition.
The definition and answer can be both to do with communicating as well as being past participle verbs.
Maybe they are linked in a way I don't understand?

'pc hurried off' is the wordplay.
'off' indicates an anagram.
'pc'+'hurried'='pchurried'
'pchurried' anagrammed gives 'CHIRRUPED'.

'as' is the link.

Can you help me to learn more?

(Another definition for chirruped that I've seen is " Tweeted".)

I've seen this clue in The Guardian.

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.