The clock in dreams stands for the symbolism of the time that is passing by. Maybe there is some important event in your life and the unconscious mind of yours reminds of it. The dream could also indicate the worries you have about making things on time. Perhaps there is apparent time line that needs to be succeeded, therefore the dream suggests you to do things faster. On the other hand, the dreams about clock could indicate the end of something sometimes even death, but only if the clocked has stopped working. Those people who are suffering from the serious illness very often dream about the clock, because they know there is not much time left. If you see the clock, that is going backwards, then such dream indicates the important step you took back. Perhaps the dream suggests you to become braver and do things faster. Make sure you do not stay at one point of the project and moving forward all the time.
Read more about dreaming of Clock in other dream meanings interpretations.