I think that an Aged Rope Phrase is
>! An anagram of a work by Edgar Allan Poe ("Aged Rope" is an anagram of "Edgar Poe")

Examples
>! Enamel Tar = Tamerlane  
>! Enable Lane = Annabel Lee  
>! Nice Beer = Berenice  
>! He Houses Four = House of Usher  
>! Adequate Ford Mesh = (The) Masque of (the) Red Death  
>! A Lethal Letter = Tell-Tale Heart  
>! A Nutmeat Atoll = Mellonta Tauta  
>! Arterial Bum Pure = (The) Premature Burial  
>! Hare Vent = The Raven  
>! Deplaned Thump Unit = (The) Pit and the Pendulum