Employ a Singer (3)
I believe the answer is:
sew
'employ a singer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sew that I've seen before include "Stitch with needle and thread" , "Do some needlework" , "Use a needle and thread" , "Make stitches" , "Fasten with needle and thread" .)