I'm irate having changed when show must go on? (7)

I believe the answer is:

airtime

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

'show must go on?' is the definition.
I know nothing about this answer so I can't tell whether this works.

'i'm irate having changed' is the wordplay.
'having changed' indicates anagramming the letters.
'im'+'irate'='imirate'
'imirate' anagrammed gives 'AIRTIME'.

'when' is the link.

Can you help me to learn more?

(Other definitions for airtime that I've seen before include "Minutes allocated to a broadcaster" , "Duration of broadcast" , "exposure on waves?" , "Duration of TV/radio programme" , "spell on the waves?" .)

I've seen this clue in The Sun.

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.