| Plausible Pseudonym |
You get it as a 3rd level spell. "Early access" is a benefit for some patron/bloodline/discipline/whatever class features that give bonus spells. If you get it before you can cast it then you get it as a special spell at a lower level that you can cast at that level.
Some class features also give bonus spells that are late access, with the same proviso. Psychics can learn Ethereal Jaunt as a 6th level spell, but several psychic disciplines give it as a bonus spell at 14th, so they learn it as a 7th level spell.