Answer:

PROTEM

Answer	Crossword Clue
PROTEM	For the nonce
PROTEM	For the time being
PROTEM	President ..

PROTEM	For now
PROTEM	Committee ... (short-lived group)
PROTEM	President ... (acting head)
PROTEM	Committee ...
PROTEM	President ...
PROTEM	President ..: Senate bigwig
PROTEM	For now, for short
PROTEM	For a while

PROTEM	President .. (Senate official)
PROTEM	For the time being, briefly
PROTEM	Filling in
PROTEM	President ... (acting leader)
PROTEM	President ... (Senate bigwig)
PROTEM	For the present.
PROTEM	For the time being.
PROTEM	For the time being: Lat.

PROTEM	Temporarily.
PROTEM	For the nonce.
PROTEM	For the time (being).
PROTEM	Words for an interim official
PROTEM	Not permanent
PROTEM	Relative of ad hoc
PROTEM	For an interim
PROTEM	Like some presidents

PROTEM	Speaker ...
PROTEM	President -- (acting head)
PROTEM	Senate position
PROTEM	President follower
PROTEM	For the time being, in Latin
PROTEM	For the time being, in Latin, briefly
PROTEM	"President" follower
PROTEM	Temporarily to Pliny

PROTEM	Kind of president