The headword is third person singular of the aorist e)/tlhn, listed under *tla/w in LSJ. Same entry in the Lexica Segueriana, and in scholia on Homer, Iliad 1.534, where it occurs. (Photius and other lexica have a parallel entry for e)/tlhs, reckoned to be quoted from either Homer, Iliad 17.153 or Sophocles.)
See also (for this verb and gloss) tau 382, tau 707.