Expert composer making records (8)
I believe the answer is:
archives
'records' is the definition.
(I've seen this before)
'expert composer' is the wordplay.
'expert' becomes 'arch' (I've seen this in other clues).
'composer' becomes 'ives' (I've seen this before**).
'arch'+'ives'='ARCHIVES'
'making' acts as a link.
(Other definitions for archives that I've seen before include "data" , "Collections of old documents" , "Stored records of organisations" , "Collections of records of organisations or institutions" , "Public records" .)