Throughout Fashion Month, gauzy sheer materials left the realm of ethereal robes and entered the business informal chat. Roberto Cavalli, Designer Who Celebrated Excess, Dies at 83From the mid-1990s onward he was one of the largest names in fashion, with stores around the world and movie star admirers like Lenny Kravitz and Cindy Crawford. Each week, The Times’s fashion director and chief fashion critic will answer a fashion question — for men or women — in our new fashion newsletter. Garment staff all over the world make every little thing from luxurious purses to fast fashion leggings. Cadolle, a maker …