Clavosurcula sibogae is a species of sea snail, a marine gastropod mollusk in the family Cochlespiridae.

(Original description) The thin, clavate shell has a convex spire, attenuated towards the apex, with along, slender siphonal canal.

The sculpture consists of numerous raised spiral striae, rather fine in upper part of whorls, very fine on a narrow zone just above the keel, coarser on the keel, much coarser on the basal part of body whorl and on the siphonal canal, which is long and slender.

The peristome is thin, broken, according to the growth lines with a wide, deep sinus above, then strongly protracted.

The columellar margin is nearly straight above, along the body whorl, then concave, the upper part at the siphonal canal straight, then strongly contorted to the left, with a thin layer of enamel, stronger at upper part of the siphonal canal.