As unlikely as it sounds, Carly Simon’s first paid gig was singing jingles for her uncle’s company: one of the pre-eminent singer-songwriters of a generation not short on pre-eminent singer-songwriters cutting her teeth on adverts for cold cream, household mops and local banks. Fast forward a few years and she’s winning her first Grammy for Best New Artist with a debut single, “That’s The Way I’ve Always Heard It Should Be”, which dared to question the preferred currency of popular music: love and romance. Jac Holzman, initially her sole cheerleader at Elektra Records, was vindicated: Simon staked her place in the slipstream, but not the shadow, of Carole King and Joni Mitchell, her seductive alto honey-dripping lyrical scepticism, wit, rapture and realism…