“A slice of greasy blues soul that draws from the Willie Dixon classic ‘Back Door Man,’ Clarence Carter’s ‘Back Door Santa,’ co-written with Marcus Daniel for the 1968 compilation Soul Christmas, adds a touch of raunch to the holiday celebrations. ‘I ain’t like old Saint Nick,’ Carter barks over a bleating horn section and chopping funk guitar, ‘he don’t come but once a year. I come runnin’ with my presents every time you call me dear.’ By 1968, Clarence Carter was no stranger to the cheating oeuvre, having scored a Top 6 pop hit in 1967 with the breathtaking ‘Slip Away‘ – two impeccably crafted minutes of Muscle Shoals soul that masterfully balances regret, longing and lust on the rough edge of Carter’s pleading, powerful voice. … Wilson Pickett, Aretha Franklin, Joe Tex, Arthur Alexander, Percy Sledge and countless others recorded signature, career-defining songs there…