Crossword Genius

Express disapproval when adult has left chore (3)

Ross

I believe the answer is:

tsk

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'express disapproval' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'adult has left chore' is the wordplay.
'adult' becomes 'a' (abbreviation).
'has left' indicates named letters should be taken away.
'chore' becomes 'task' (synonyms).
'task' with 'a' removed is 'TSK'.

'when' is the link.

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