You might need to change the "O" in 3-down to a zero. I tried to add an alternate solution (using the O), but it didn't seem to take. Sorry -- second time I've done this!
To desire strongly - like a bird for another bird's worm? / Or maybe it's a partner in a veterinary firm...
1
2
3
4
5
6
Orizzontali
1A
To desire strongly - like a bird for another bird's worm? / Or maybe it's a partner in a veterinary firm...
4A
If a birder seeks out birds in the forests where they hide, / Then this guy must seek deer. (And see him reel from side to side!)
5A
These are main courses at dinners -- they're the "heart" of the meal. (That's the label!) / Say the word out loud, and what do you hear? A way they are brought to the table.
6A
If read as two words, this high-flying driver might just make you remark, / "It's where a certain number, irrational and famous, might be required to park."
Verticali
1D
Referring to an edge that separates wet from dry. / (I'm talking about a continent here -- where tides roll in and seagulls fly.)
2D
It means "most indefinite", "least clearly expressed". / Or it's one who visits Virginia as the Old Dominion's guest.
3D
It's a topologist's view of a bagel or doughnut before she takes a big bite. / It sounds like an astrological sign, if the sign isn't uttered quite right.
4D
"I hope you let me ramble on as I laminate this shroud..." / You'll hear three clues to this animal when you say those words out loud.