One sent off to support recording artist (7)
I believe the answer is:
epstein
'artist' is the definition.
(I've seen this before)
'one sent off to support recording' is the wordplay.
'one' becomes 'i' (Roman numeral).
'off' indicates an anagram.
'to support' says to put letters next to each other.
'recording' becomes 'ep' (extended play vinyl record).
'i'+'sent'='isent'
'isent' anagrammed gives 'stein'.
'stein' put after 'ep' is 'EPSTEIN'.
(Other definitions for epstein that I've seen before include "old artist" , "pop group's manager" , "Brian --, Beatles manager" , "British sculptor, d. 1959 - Beatles manager, d. 1967" , "A rock band manager" .)