File away any rough chips, helping insure very even openings (7)
I believe the answer is:
archive
'file away' is the definition.
(synonyms)
'any rough chips helping insure very even openings' is the wordplay.
'openings' suggests taking the first letters (I've seen 'opening' mean this).
The first letters of 'any rough chips helping insure very even' is 'ARCHIVE'.
(Other definitions for archive that I've seen before include "Depository for records and documents" , "Records or historical papers of an institution" , "Document depository" , "Data repository" , "Record repository" .)