Crossword Clue:

Exercise one is prone to do

Answer	Crossword Clue
PUSHUP	Exercise one is prone to do
DUTY	What one is bound to do.
NOTE	Do is one

PROMISE	"I do" is one
OBEY	Do as one is told
ADSLOGAN	"Just do it" is one
MOTTO	Seabees' "Can Do" is one
PALINDROME	"Do Geese See God?" is one
SEABEE	One whose motto is "Can Do"
DUET	"Anything You Can Do . . ." is one
PSA	"Do you know where your children are?" is one: Abbr.

LONELIEST	"One is the ... number that you'll ever do" (Three Dog Night lyric)