Possible Clues:

• It's already out of the bag
• Everyone knows this writer's captivated by awful coterie I won't be part of
• Respect one broadcasting what's already well known
• It's thinly disguised
• Generally known matter, so pretence silly
• Supposedly unknown but actually well-known fact
• So pretence is ridiculous, if this?
• Unpublicised fact about golf championship that everyone knows?
• A lot of people know it who probably shouldn't
• It's widely known duck enclosures on island last given precedence