Restored health, but on borrowed time again? (1,3,5,2,4)

I believe the answer is:

a new lease of life

I'm a little stuck... Click here to teach me more about this clue!

'restored health but on borrowed' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'again?' is the wordplay.
I cannot really understand how this works, but
'again?' could be 'anew' ('anew' can be a synonym of 'again') and 'anew' is present in the answer.
This explanation may well be incorrect...

'time' is the link.

Can you help me to learn more?

I've seen this clue in The Guardian.

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