Crossword Genius

Remaining calm when they imply amusing oneself with tech company is old, in short (7,2,4)

Ross

I believe the answer is:

playing it cool

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'remaining calm when they imply' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'amusing oneself with tech company is old in short' is the wordplay.
'amusing oneself' becomes 'playing' ('play' can be a synonym of 'amuse oneself').
'with' is a charade indicator (letters next to each other).
'tech company' becomes 'itco' (I can't explain this - if you can you should give a lot more credence to this answer).
'in short' means to remove the last letter.
'old' with its final letter removed is 'ol'.
'playing'+'itco'+'ol'='PLAYING IT COOL'

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I've seen this clue in The Irish Times.
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