Answer: think

AnswerCrossword Clue
THINKCerebrate.
THINKBelieve.
THINKGood motto for everyone.
THINKSign on an office wall.
THINKMotto for the office wall.
THINKSign in an office.
THINKOffice wall sign.
THINKExcogitate.
THINKIronic twist to a one-word maxim.
THINKOffice sign.
THINK... twice (reconsider).
THINKUse your brain
THINKPopular office sign
THINKUse gray matter
THINKCerebrate
THINKOffice-wall sign
THINKCorporate motto
THINKKind of tank
THINKMuse
THINKIdeate
thinkto think about until a conclusion is reached; understand or solve by thinking
THINK"Use your head!"
THINKFamous IBM office sign
THINK"C'mon, Aimee, ...! There's gotta be a good clue out there for this word ..."
THINKBe reasonable?
THINKUse your head
THINKRack one's brains
THINK"Try to remember!"
THINKReason
THINKType of tank
THINKTank type
THINKExercise one's gray matter
THINKCogitate
THINKEnd of the observation
THINKPut your mind to work
THINKAptly named Final Jeopardy! theme song
THINKEND OF QUOTE
THINKUse one's noodle
THINKDream (up)
THINKDeliberate