“Only player to win three Super Bowl M.V.P. awards before turning 30”

"Oscar" of the French film industry

Feeling after a long hike

Singer/composer Bareilles

Prematurely

Many a fund-raising target, informally

"We have a mutual friend?!"

Smurf who is more than 500 years old

See 20-Across

With 19-Across, swing dance originating in Harlem