Crossword Genius

Quarantine is over, not before time (7)

Ross

I believe the answer is:

isolate

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

'quarantine' is the definition.
(I know that quarantine is a more specific form of isolate)

'is over not before time' is the wordplay.
'over' becomes 'o' (cricket abbreviation).
'not before time' becomes 'late' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'is'+'o'+'late'='ISOLATE'

Can you help me to learn more?

(Other definitions for isolate that I've seen before include "Cut off from all contact" , "Strand" , "Pick out" , "Segregate or quarantine" , "split up" .)

I've seen this clue in The Guardian.
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