A story we rewrote and how long it took (3,5)

I believe the answer is:

two years

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'how long it took' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'a story we rewrote' is the wordplay.
'rewrote' indicates an anagram (I've seen 'rewritten' mean this).
'a'+'story'+'we'='astorywe'
'astorywe' anagrammed gives 'TWO YEARS'.

'and' is the link.

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I've seen this clue in the Evening Standard.

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