If I defy a Star Crossed that is played from Fizz, does the Star Crossed still get recycled?

Yes, if you use Defy to counter a Star-Crossed played via Fizz, Trickster's triggered ability, the Star-Crossed will still be recycled.

According to RiftJudge FAQ #10413 and #10401, this is because Fizz, Trickster's ability creates a replacement effect that specifically monitors the spell's movement from the chain.

Why it is recycled:

1. Replacement Effect: When you play a spell using Fizz, Trickster's "When you play me" ability, it grants that spell the instruction "Recycle that spell after you play it."
2. Override: This instruction creates a replacement effect that applies whenever the spell would leave the chain for any reason—including finishing resolution, being banished, or being countered.
3. Countering: When Defy counters the spell, the normal rule (Rule 425.1.a) would be to send the spell to the trash. However, the replacement effect from Fizz overrides this, replacing the "send to trash" event with a "recycle" event.

Therefore, the spell is moved to the bottom of your deck instead of your trash.