Celebrated call for help (6)

I believe the answer is:

mayday

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

'for help' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

(Other definitions for mayday that I've seen before include "Cry of distress" , "Bank holiday - distress signal" , "please help" , "Radio distress call" , "Request for help" .)

I've seen this clue in The Globe and Mail.

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.