It’s rare these days to get new music from Sade — after all, she hasn’t released an album since 2010’s “Soldier of Love” — but in just a few months, she’s set to put out her first new song in years.

The name Sade instantly conjures up a sensual, sophisticated atmosphere. Born Helen Folasade Adu, the British-Nigerian singer rose to prominence with her 1984 debut album, Diamond Life, which spawned ...