Crossword clues for Think up.:THINKMuseTHINKIf I Only Had a Brain verbTHINKINGSVELTE MONARCHTHINKINGHenry VIII, after dietingTHINKSomething to do twice?THINKFamous IBM office signTHINKMaintainTHINKING*Trying to rememberTHINKMotto for the office wall.THINKPopular office signTHINKUse one's beanTHINKGet lost in a brown studyTHINKOffice sign.THINKSign in an office.THINKSPuts chin to fistTHINKCorporate mottoTHINKSSpeculatesTHINKTank typeTHINKPonderTHINKAssumeTHINKSReflects.THINKCerebrate.THINKUse gray matterTHINKIdeateTHINKSFiguresTHINKConcentrate!THINKKind of tankTHINK___ twice (reconsider).THINKWith 19-Across, reconsider ... or a hint to the starts of the five starred cluesTHINKSee 1-AcrossTHINKExercise one's gray matterTHINKIBM slogan that inspired an Apple sloganTHINKEIBM's slogan, in ye olden timesTHINKBe reasonable?THINKSHolds the opinionTHINKUse your headTHINKEnd of the observationTHINKReasonTHINKSUses one's nogginTHINKDeliberateTHINKUse your brainTHINKEngage in cerebrationTHINKOffice wall sign.THINKUse one's gray cellsTHINKOld IBM mottoTHINKExcogitate.THINK1968 hit for 42-AcrossTHINKReflectTHINKUse one's noodleTHINKUse the bean