The Clyde's Market in Portal will soon do a vanishing act, but should reappear over the next four months as an all-new store with a full-size deli and state-of-the-art gas pumps. A note on the door informs customers that Sunday will be the last business day until the transformation is complete. Greg Woolard, CEO of the Glennville-based convenience store chain named for his father, said the building is slated to be torn down beginning the first week of April.