Film explores what women owe to a ’60s icon and the tiny garment she’s famous for

There’s an exchange in Sadie Frost’s debut documentary, “Quant,” that succinctly captures the essence of the film’s subject — one of the 1960s’ most renowned fashion icons — and the garment she’s best known for.

There’s an exchange in Sadie Frost’s debut documentary, “Quant,” that succinctly captures the essence of the film’s subject — one of the 1960s’ most renowned fashion icons — and the garment she’s best known for.