The new Clinton Sonic Drive-In now plans to open at 10 a.m. today (Wednesday, Feb. 23), after missing a previously announced opening for Monday (Feb. 21). Officials at the restaurant, at 2210 N. Charles G. Seivers Blvd. (next to Buddy’s bar-b-q, said Tuesday morning that the opening was delayed to allow for completion of equipment setup and additional staff training.