Crossword Genius

Record old trademark, perhaps (4)

Ross

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" .)

I've seen this clue in The Telegraph.
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