McClellan worked as a Congregationalist minister and as a high school teacher and principal. His writing, generally self-published, addresses religion, nature, and romantic love while only occasionally revealing an emotional struggle against racial discrimination.

All Nashville is a-chill! And everywhere, As wind-swept sands upon the deserts blow, There is, each moment, sifted through the air, A powered blast of January snow. O thoughtless Dandelion! to be misled By a few warm days to leave thy natural bed, Was folly growth and blooming over soon. And yet, thou blasted, yellow-coated gem! Full many hearts have but a common boon With thee, now freezing on thy slender stem. When once the heart-blooms by love's fervid breath Is left, and chilling snow is sifted in, It still may beat, but there is blast and death To all that blooming life that