Singers or such (6)
I believe the answer is:
chorus
'singers' is the definition.
(chorus can mean a group of singers)
'or such' is the wordplay.
'or such' anagrams to 'CHORUS'.
However, I'm not clear how this is indicated.
Can you help me to learn more?
(Other definitions for chorus that I've seen before include "Some chanting" , "Song's repeated part" , "Section of song" , "Greek tragedians" , "Group of singers as in musicals" .)