Entry lacking, Adler reports, in mss TFV, and a marginal addition in A.
The headword (which must be quoted from somewhere) is aorist active participle, masculine nominative singular, of the verb e)kplh/ssw; cf. epsilon 569, epsilon 574, epsilon 579, epsilon 580. This verb has both the literal sense translated here and the sense "astound" (i.e. "drive out of one's wits"). In both senses it can indeed be construed with the genitive of place (in addition to an accusative object); see LSJ s.v. (web address 1).
The (earlier) Sytactical Lexicon of Codex Laurentianus 59.16 lists this headword among other epsilon verbs which can govern a genitive.