Clownish, a.
Of or resembling a clown, or characteristic of a clown; ungainly; awkward. "Clownish hands." Spenser. "Clownish mimic." Prior. -- Clown"ish*ly, adv.
Syn. -- Coarse; rough; clumsy; awkward; ungainly; rude; uncivil; ill- bred; boorish; rustic; untutored.
Shades of meaning
Fernald has no entry of its own for clownish; he lists it under awkward, rustic.
He lists it without comment; the entries above explain its neighbors.