I found it. I have no idea what the clue means...hate the clue so much.
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"Close to a zero (4)"...My clue was referencing Oval
A positively Damascene conversion. Welcome to the dark side. (Clue made me grin too.)
I know. I didn't enjoy it! I feel wrong now.
@Kidneys started
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A positively Damascene conversion. Welcome to the dark side. (Clue made me grin too.)