Answer:

mamie

Answer	Crossword Clue
MAMIE	First lady of the 1950s
MAMIE	First lady between Bess and Jackie
MAMIE	Mrs. Eisenhower

MAMIE	Former first lady
MAMIE	Pioneering blues singer Smith
MAMIE	1950s White House name
MAMIE	First lady after Bess
MAMIE	1950s White House resident
MAMIE	Onetime White House resident
MAMIE	First lady with bangs
MAMIE	Ike's mate

MAMIE	Actress Van Doren
MAMIE	Bess's follower
MAMIE	1950's White House name
MAMIE	Jackie's predecessor
MAMIE	A Van Doren
MAMIE	50's White House name
MAMIE	Wife of 31 Down