Possible Clues:

• Matched-pair pronoun
• Partner of his
• The wife's, e.g
• The woman's husband, the Queen's
• First man to make the cover of the U.S. edition of Vogue
• License plate frame pronoun
• '___ to Hold' (Deanna Durbin film)
• Word repeated by Romeo in 'As mine on ___, so ___ is set on mine'
• '___ to Hold' (1943 musical romance)