Gloppy saxophones. Oozing violins. Dopey lyrics (“Lady, please don’t squeeze my Charlie”). Echo overdubbing. What sounds like half the population of Tennessee singing in the background. This is, in other words, the worst of the Nashville sound. Margo (plain old Betty Lou Smith before the Music City folks started gussying her up) has had some pleasant-enough hits in the past I ike Save Your Kisses and Take My Breath A way, and this LP’s It Only Hurts for a Little While has lately been at the top of the country lists. It is, alas, the least cluttered of the cuts on an album that indulges in too much ersatz country posturing and not enough plain singing.