Prohibit the singer getting a neckerchief (7)
I believe the answer is:
bandana
'neckerchief' is the definition.
(bandana worn around the neck)
'prohibit the singer getting a' is the wordplay.
'prohibit' becomes 'ban' (banning is a kind of prohibiting).
'the singer getting' becomes 'dan' (I can't justify this - if you can you should believe this answer much more).
'ban'+'dan'+'a'='BANDANA'
Can you help me to learn more?
(Other definitions for bandana that I've seen before include "Coloured square worn around the head or neck" , "Spotted square" , "Handkerchief worn round the head or neck" , "Coloured square for wearing" , "Large and brightly coloured handkerchief" .)