Singer brings in right band section (5)
I believe the answer is:
brass
'band section' is the definition.
(I've seen this in another clue)
'singer brings in right' is the wordplay.
'singer' becomes 'bass' (bass is a kind of singer).
'brings in' indicates putting letters inside.
'right' becomes 'r' (common abbreviation).
'bass' enclosing 'r' is 'BRASS'.
(Other definitions for brass that I've seen before include "Ready" , "An alloy; part of orchestra" , "Gall" , "Impertinence" , "Boldness" .)