Record old trademark, perhaps (4)
I believe the answer is:
logo
'trademark perhaps' is the definition.
(I know that trademark is a type of logo)
'record old' is the wordplay.
'record' becomes 'log' (logging is a kind of recording).
'old' becomes 'o' (abbreviation as in OT - Old Testament).
'log'+'o'='LOGO'
(Other definitions for logo that I've seen before include "Company emblem or device" , "Emblematic design" , "Symbolic design" , "Small emblem or device" , "Symbol or emblem used by organisation" .)