Free time for a convict (7,4)

I believe the answer is:

release date

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'a convict' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'free time' is the wordplay.
'free' becomes 'release' (to release someone is to free them).
'time' becomes 'date' (date is a kind of time).
'release'+'date'='RELEASE DATE'

'for' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Independent and The Globe and Mail.

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