Our lot’s thus working late shift (5,4)

I believe the answer is:

thats life

'our lot's thus' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'working late shift' is the wordplay.
'working' indicates an anagram.
'late'+'shift'='lateshift'
'lateshift' with letters rearranged gives 'THATS LIFE'.

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

I've seen this clue in The Times.

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