A couple of lines on paper briefly make such a record (3-4)
I believe the answer is:
all-time
'such a record' is the definition.
(I've seen this in another clue)
'a couple of lines on paper briefly' is the wordplay.
'couple of' shows that letters should be duplicated.
'lines on' becomes 'l' (abbreviation as in lines of poetry. I am not sure about the 'on' bit.).
'paper' becomes 'times' (The Times or The New York Times).
'briefly' means to remove the last letter.
'l' duplicated is 'll'.
'times' with its final letter taken away is 'time'.
'a'+'ll'+'time'='ALL-TIME'
'make' is the link.
Can you help me to learn more?
(Other definitions for all-time that I've seen before include "Unsurpassed to date" , "So far unsurpassed" , "Best ever" , "As yet unsurpassed" , "Hitherto unsurpassed" .)