Possible Clues:

• Pure as the driven snow
• Pure girl a bit square, ultimately
• Kill resident perhaps with Elizabeth from Westmeath on Trim site
• 'Free Willy': man having penned it blameless
• Pure, irreproachable
• Kill resident perhaps with fleur-de-lis opening chess match
• Relative of 17 down is leading chess player living in Kildare
• Without blame; chaste
• The boys in green are not responsible