Possible Clues:

• The old issue of REBMUN?
• Perhaps net copy of magazine
• Net, for example? Square type
• In short, on, not no, that's not the current issue
• Previous issue of lumbar analgesic
• No, in short, it's not the front one and not the current one
• Spinal injection no longer in vogue?
• Old magazine showing what footballers may have on shirts?
• Out-of-date magazine issue
• Old issue to support value of arithmetic