Movie Title

History

Purchase one orange, slice it in half and photograph it on a plane bckground.
Source an old clock, take it apart and photograph it on a plane background.
Simple!

Method

Open the orange image, rotate 90°cw and adjust the levels to brighten it up.
Add a new a Adjustment Layer for Hue/Saturation. Play about till the BG colour looks right.
On the layer mask, paint out the orange so that its' original colour shows.
Make a carefully select the clock and paste it into the orange file as a new layer.
Use Edit> Transform> Scale to reduce the clock to the required size, then rotate and move it.
Use the layer mask to remove all the little bits of visible background (between the spring coils etc).

At this stage the image is almost complete, but looks very flat. Make a shadow by duplicating the clock layer then moving it down and to the left.
Set Contrast on this layer to -100. and brightness to -50.
This leaves a very hard and opaque shadow. To make it more natural, set opacity to 80% and change merge method from normal to difference.