Audiences will have to wait a little longer to familiarize themselves with “ Clayface ,” one of DC’s lesser known characters. The superhero film was originally slated to hit theaters on Sept. 11. It will now move to Oct. 23. “Clayface,” for those not steeped in all things Gotham, is a shapeshifting Batman villain. The genre has been described as a body horror, so think Cronenberg. It will be directed by James Watkins (“Speak No Evil”)  from a screenplay by Mike Flanagan (“Doctor Sleep”) and