Answer:

ishall

Answer	Crossword Clue
ISHALL	".. return"
ISHALL	"... return."
ISHALL	"... return"

ISHALL	Start of a MacArthur quote
ISHALL	Start of a declaration
ISHALL	Words from a promising individual?
ISHALL	Stilted-sounding "Consider it done"
ISHALL	Promising start?
ISHALL	Promising beginning?
ISHALL	Promising words?
ISHALL	Formal promise?

ISHALL	Formal-sounding commitment