Answer: enduring

AnswerCrossword Clue
ENDURINGStanding the gaff
ENDURINGPermanent
ENDURINGTimeless
ENDURINGFor the ages
ENDURINGRemaining firm.
ENDURINGNot ephemeral.
ENDURINGLike "Ol' Man River"
enduringENDURE, to last (to continue (to go on with))
enduringContinuing or long-lasting