The best way is to use a barred cock over black breasted red hens. We started our crele phoenix by using a crele OEGB roo on a BBR hen, bred the one chick from that (pullet) to a BBR roo which made a 'double' sexlink, the males are crele with light legs and the females are BBR with blue legs. We will keep the best rooster and breed it back to BBR hens to get better type and leg color.
What breed do you want it in? If you want crele rocks or wyandottes it would be best to use welsummer hens with a barred rooster.
You can make a type of crele with partridge and barred, the males would be correct but the females would have the pencilling which isnt really crele, it would be more like barred partridge if anything.