Note from singer picked up by audience (6)
I believe the answer is:
tenner
'note' is the definition.
(a ten pound sterling bank note)
'singer picked up by audience' is the wordplay.
'singer' becomes 'tenor' (tenor is a kind of singer).
'picked up by audience' shows a homophone (sound like) (as it would sound to an audience).
'tenor' sounds like 'TENNER'.
'from' is the link.
(Other definitions for tenner that I've seen before include "PS10" , "Two fivers" , "Ten-pound note (inf.)" , "note form" , "A spot of money" .)