First, don't clone anything unless you know it is female, or plan on later possibly having to just toss the plants.

Second, flowering merely means you change your light schedule from roughly 18/6 to roughly 12/12. If your plants will still flower fine with 13/11 then do that (more light = more weed). You can look up flowering light times on the internet. Also when most people flower, they use different nutrients.

Third, yes you can skip the vegitative stage all together, but it would be much better to go to 12/12 after the plant has roots. It will take too long to root otherwise, and chances are the plants won't be quite as healthy overall for several reasons. Many people veg just until the plants have a couple inches of roots with a fluor (8-10 days in a cloner), then go immediatly to a HPS light and bloom. The vast majority however, give their plants some veg time after rooting (at least 2 weeks, but more like 4 to 8) because it will yield much more weed this way. Longer veg = more plant material = more weed when flowered. Of course longer veg also equals less harvests per year. There are pros and cons to both methods.

Say "less harvests" 3 times fast. Get stoned first though.