Possible Clues:

• The unstudied way to leave 11 across without a head
• Free from cunning
• Natural that Cockney should sound callous
• Simple cockney with no feelings
• Simple though callous, as East Enders may put it
• Is it natural to be so lacking in culture?
• Without guile or affectation
• Are you simply not so much 9 down?
• Being ingenuous he left without a suit
• Cockney sounds cruel, but is actually naïve