Tinashe‘s choice of Devonté Hynes as a collaborator isn’t such a gamble at this point, but their latest team-up is still appealingly audacious. The Los Angeles-based pop star in waiting and the eclectic British multi-threat teamed up before, on “Fugitive,” a pained, poignant song from Tinashe’s 2013 mixtape Black Water. And both artists are ready for their closeups: Her debut album, Aquarius, arrives on October 7 preceded by the hit “2 On” — a celebration of booze, weed and DJ Mustard’s austere production — while the Blood Orange/Lightspeed Champion mastermind recently reworked Sia’s chart-swinging “Chandelier.” (she also not long ago partnered with A$AP Rocky — and with TV on the Radio’s Dave Sitek). “Bet,” from Aquarius, is more expansive and atmospheric than “Fugitive”; it’s a slow-burn opus that brings to mind Frank Ocean, from the rain-in-paradise imagery (“It’s been months now since you came here to California / I’ll be here to hold ya”) to the way an of-the-moment electronic groove eventually breaks out, “Pyramids”-like, in an elegiac guitar solo. “I’ll be here tomorrow,” Tinashe promises, amid minimalist piano plinks. “Bet” isn’t safe, and it’s to the credit of everyone involved that it pays off this richly.