Separate intro for song on record (5)
I believe the answer is:
sever
'separate' is the definition.
(sever can mean to split or separate)
'intro for song on record' is the wordplay.
'intro for' indicates taking the first letters.
'on record' becomes 'ever' (eg the best ever, best on record).
The first letter of 'song' is 's'.
's'+'ever'='SEVER'
(Other definitions for sever that I've seen before include "Cut apart, maybe a relationship" , "Put an end to (connection or relationship)" , "Cut off suddenly" , "Cut or break off, perhaps a relationship" , "Cut off, separate" .)