godan verb (-su)
cut out (a garment) from cloth
Used in sewing and dressmaking contexts for cutting fabric pieces according to a pattern.
型紙に合わせて生地からワンピースを裁ち出す。
Cut out a dress from the fabric according to the pattern.
裁つ is a general verb for cutting cloth, while 裁ち出す specifically means cutting out garment pieces from a larger piece of fabric.
Compound of 裁ち (continuative form of 裁つ 'to cut cloth') + 出す 'to take out', literally 'to cut out'.