Can spellcrash be used on extracts?

[Astrala]

I've been looking at appropriate spells for a wizard and came across Lesser Spellcrash. The idea is that it causes a caster to loss one of their highest prepared spells or spell slots, depending on what type of caster they are. My questions is, can this apply against Investigators extracts and how would they be classified?

[avr]

No, extracts aren't spells. If they were an investigator would have to be compared to a prepared caster though.