expression, noun-modifying (irregular)
familiar-looking; one remembers seeing
Used before a noun to say that something looks familiar or that one has seen it before. Often implies a vague recollection rather than a clear memory.
あの人はどこかで見覚えのある顔だ。
That person has a face I feel I've seen somewhere before.
この絵には見覚えのある風景が描かれている。
This painting depicts a landscape that looks familiar.
Phrase composed of 見覚え (memory of having seen) + の (attributive particle) + ある (to exist). The whole phrase functions as a prenominal adjective meaning 'that one remembers seeing'.