Possible Clues:

• Half a matched set, perhaps
• Belongs to that girl
• 'His,' to Bierce
• 'I'm Yours and I'm ___' (1969 Johnny Winter song)
• Possessive for most women
• "... nor shall ever see that face of __ again": Lear
• '... nor shall ever see that face of __ again': Lear
• Opposite of ''his''
• That queen's
• Possessive contained in "theirs"