Crossword Genius

Announcement of resignation disrupted late shift (5,4)

Ross

I believe the answer is:

thats life

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'announcement of resignation' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'disrupted late shift' is the wordplay.
'disrupted' indicates anagramming the letters.
'late'+'shift'='lateshift'
'lateshift' with letters rearranged gives 'THATS LIFE'.

Can you help me to learn more?

(Another definition for thats life that I've seen is " Expression of the fatalist".)

I've seen this clue in The Independent.
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