|I have used this method successfully for many years. It is from the Reader's Digest "Sewing and Knitting" Book.
1. Place a row reinforcement stitches just inside the seamline from the top of the garment edge to just below the second notch on the centre front/back panel. Clip between the notches 3 or 4 times and one below the notch.
2. With the side panel on top, match and pin the seamline, spreading the clipped edge to fit. Make additional clips if necessary. Tack in place.
3. With the clipped side up, stitch on the seamline, beyond the edge of the clips, being careful to keep the underside smooth.
4. Remove the tacking and finger press the seam open. Notch out the fullness from the inward curve ( the side panel pieces), staggering the clips wherever possible.
5. Close the seam and place over a tailor's ham and with the tip of the iron press flat. Do not press into the body of the garment especially in the curved areas.
6. With the tip of the iron, press the seam open over the tailor's ham. Move the seam around to match the curve of the seam with the curve of the tailor's ham. Leave to cool.