File a recipe's first herb (7)

I believe the answer is:

archive

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'file' is the definition.
(I've seen this in another clue)

'a recipe's first herb' is the wordplay.
'recipe' becomes 'r' (abbreviation in medical prescriptions).
'first herb' becomes 'chive' (I can't justify this - if you can you should believe this answer much more).
'a'+'r'+'chive'='ARCHIVE'

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(Other definitions for archive that I've seen before include "Document depository" , "Records or historical papers of an institution" , "File away" , "Depository containing historical records" , "Stored data" .)

I've seen this clue in the Sydney Morning Herald.

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