Take a pants-mine is a ridiculously unwearable with lace-y all over. But, it's well-tailored and has romantic vibe, of a fine lace and with lovely lining,just lovely. It would be great to turn it into clutch.

Cut 12inch out from one of the pant legs?? Sorry,I think it sounded akward, but anyhow,here it is.

Turn it inside out, and sew across the bottom.

Now it pretty much like a clutch already.Fold the other half to the point where your want the cover to be. Mine is 5 1/2inch. Rip the seam off.

Flip it inside and sew..It gives the clutch a sturdier texture now that the fabric is double-layered.

Work on the cover, I did mine ordinarily, an envelope-y type

There's many options of how to secure the cover/flip to the body; brooch,magnetic closure, frog buttons, velcro, or snap buttons.
I ended up stitching a purple ribbon at the centre and tying it bow.The color just popped out and i love it.
For more details hop over to my blog
http://petitecrafterella.blogspot.com/