Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Cilla, ae, f., = Κίλλα, a town in Troas, distinguished for the worship of Apollo, Plin. 5, 30, 32, § 122; Sen. Troad. 227; acc. Cillan. Ov. M. 13, 174 (cf. Hom. Il. 1, 38).