Baffled by this crossword clue / answer (spoiler alert - Irish Times Simplex crossword)

[WhitePhantom]

The clue is:
Lose control during a performance through laughing

And the answer is:
Corpse

How is corpse the answer to this clue?! 🤔

That is what it's called though, corpsing or to corpse.

That's the term they use in theatrical circles

...when you get a dose of the giggles at the worst possible time

Corpsing is when you start laughing during a live performance.

It's the theatre darling

Good god, I'm obviously a total pleb!! I never heard of this before. Must start going to the theatre more 😅

You learn something new every day, and one thing I love learning is words!

I was equally baffled.

Yes, it's the verb to describe uncontrollable giggles during a performance. I believe it's specifically British / Irish slang. In American English it's called 'breaking character' or simply 'breaking'.