Cashier lost about five records (8)
I believe the answer is:
archives
'records' is the definition.
(an archive is a collection of records)
'cashier lost about five' is the wordplay.
'lost' indicates anagramming the letters.
'about' is an insertion indicator.
'five' becomes 'V' (Roman numeral).
'cashier' with letters rearranged gives 'archies'.
'archies' enclosing 'v' is 'ARCHIVES'.
(Other definitions for archives that I've seen before include "Stored records of organisations" , "Collections of old documents" , "Public records" , "Rich vase (anag.)" , "Collections of records of organisations or institutions" .)