Related Clues:

• Clark Kent, for one
• Ex-orphan
• One who's taken in
• Ernie of ''My Three Sons,'' e.g.
• Missing link, supposedly
• One placed by an agency, perhaps
• Primitive sort
• Oliver Twist, for one
• Stuart Little, for one
• Human ancestor
• Kid with a new home
• Tarzan, say
• Missing link, perhaps
• Transitional figure
• One taken under another's wing