Hi Clearwater and other contributors,
WINGER had me baffled too; however, on another site, I found an explanation that 'winger' was London slang [it wasn't suggested that it was Cockney slang] for something that was extremely useful - like a gadget.
I spent some time looking at various on-line slang dictionaries but I regret that I cannot confirm that explanation...
Regards,
Caravaggio