It's a treat to get away in middle-age (6)

I believe the answer is:

outing

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'it's a treat to' is the definition.
I can't judge whether this defines the answer.

'away in middle-age' is the wordplay.
'away' becomes 'out' (synonyms).
'middle' means to look at the middle letters.
The middle letter of 'age' is 'g'.
'out'+'in'+'g'='OUTING'

'get' is the link.

Can you help me to learn more?

(Other definitions for outing that I've seen before include "that puts the private on parade?" , "Day excursion" , "Day trip" , "Short pleasure trip" , "Excursion as for picnic" .)

I've seen this clue in the Evening Standard.

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