Hollywood Monster , one of Roland Emmerich's early productions, is also known by it's American name of Ghost Chase .
Here's the brief (and I do mean brief) synopsis found on the Internet Movie Database:
Plot Summary for Hollywood-Monster (1987)
In an old Hollywood mansion, the spirit of an old family retainer inhabits an old grandfather clock. When a movie company uses the mansion for a film, the spirit inhabits the body of an alien and persuades the two filmmakers to track down an old house that will resolve a family scandal.
When you read the wonderful synopsis done by our own Trina, it makes one wonder if anyone at the IMDb actually saw the movie...
This section also features a report on the "Life on the Set" by Tim McDaniel, who plays Fred in the movie, and a glimpse behind the scenes by James Heffernan.