This sounds like a homework project, where a tutor would set a broad theme and want to see your ideas and how they develop. So I'm going to avoid giving you direct ideas because it's meant to be your work not ours! Generally if you want to explore a concept and are stuck then breaking down your creative process a bit will help. Here are a few ideas I might use...

• Brainstorm out what the concept of time means to you, literally write 'TIME' in the middle of a bit of paper; explore the objects and concepts as they come to you, think about what you can do with time.

• Find art of any form (music, film, photo's, paintings etc.) that represent or includes time and just literally steal their concept and add something of your own expression to the idea.

• Grab a pencil and draw a picture of what you think your photograph may look like.

• Go to a flea market (or ebay) and pick up a job lot of old watches (shouldn't cost much) let their colours and shapes guide you visually and forget the concept entirely.

Those would get you started, once you start having ideas then you can bin the ones that don't meet the criteria for the project...