But when Our signs came to them in plain sight and clear enough to have opened their eyes to truth, they said: "This is clearly nothing but sorcery."
So when our clear signs came to them, they said: This is clear enchantment
Muhammad Ahmed - Samira
So when Our signs/evidences came to them manifest/clearly visible to the eye and understanding, they said: "That (is) clear/evident magic/sorcery."
But when Our eye-opening signs were shown to them (- Pharaoh and his people) they said, `This is plain witchcraft (to cause disruption among the people).
But when Our Ayat (proofs, evidences, verses, lessons, signs, revelations, etc.) came to them, clear to see, they said: "This is a manifest magic."