Lifting it clear isn't necessary. All they need to do is pull it back off the wall that's protecting its belly.
I presently picture it like a lobster with a very fat behind. Gotta be a girl
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You could have Jaylene say 'not an antlion exactly. It's got a front like a lobster.' It uses the claw to lop off the Sylphie's limbs so it can feed on the fresh, living creature. Hey, spiders do this, but it still creeps us out. When the bug is a Sylphie it will be Really Evil.
That means when they first haul it up, they're hauling up the half-living, half-digested Sylphie. Only when it knows it's in deep danger does it let the body go. (Tazar will have to use the hook to pull the twitching, dying Sylphie up afterwards--Does Jaylene have rites for an organism that is part of a Founder?) THEN the fight begins. Maybe a claw locks on the iron hook and struggles to cut it, distracting the hungry critter.
None of the Catacombs tenderfeet have it within them take this lightly. Even Taz-man will have something to say. And Alda's remark is appropriate but inadequate.