The term CONCERN HEIR is composed of four crossword solutions: SON (3 letters), ALIENEE (7 letters), ESS (3 letters), and ESTATE (6 letters). SON is a male child of a parent, ALIENEE is a person to whom property is transferred, ESS is a suffix meaning 'belonging to', and ESTATE is a large piece of property. Together, these words can be interpreted as a person who is the SON of a parent and to whom property has been transferred, belonging to a large ESTATE.