distinctive of; uniquely applying to ~
Expresses that something is distinctive of or uniquely applying to a particular person, place, or thing.
ならでは is a fixed pattern that highlights a quality or feature that is possible only because of the subject. It carries a positive nuance, often praising the subject's uniqueness. It is used with nouns like 日本ならでは (unique to Japan), 彼ならでは (unique to him), or この店ならでは (unique to this shop).
In a sentence, ならでは can appear as Xならではの + noun, meaning 'a noun that is characteristic of X'. It can also be used predicatively as Xならではだ or Xならではのものだ. This pattern is fairly formal and is common in written language, essays, and speeches. In conversation, you might hear it, but it is not as casual as saying だけが持つ or 特有の.