Answer:

grew

AnswerCrossword Clue
GREWShot up
GREWGot big
GREWSprouted
GREWMatured
GREWGot taller
GREWSpread
GREWExpanded
GREWWent from tot to teen
GREWDeveloped
GREWMushroomed
GREWBecame bigger
GREWCultivated
GREWBecame
GREWGot bigger
GREWMultiplied
GREWEnlarged
GREWBecame an adult, with "up"
GREWGot larger
GREWIncreased
GREWBallooned
GREWSprang up
GREWSprouted like a weed
GREWWaxed
GREWNeared maturity
GREWNeeded bigger shoes
GREWIncreased in stature
GREWFilled out, maybe
GREWBurgeoned
GREWGradually became
GREWShrank's opposite
GREWFormer Ambassador to Tokyo.
GREWU.S. envoy the Japs sent home.
GREWFormer Asst. Secy. of State.
GREWNew Under-Secretary of State.
GREWUnder-Secretary of State.
GREWAmbassador to Japan, 1932-41.
GREWFormer Ambassador to Japan.
GREWEmulated Topsy.
GREWTopsy did.
GREWFlourished.