This is the chapter where the boss-name and the boss-codename are both on-page, but the binding Mr. 0 = Sir Crocodile is not yet stated. The Strawhats (and a first-time reader) hear Sir Crocodile as someone-in-Alabasta-they-won’t-meet, not as the boss they’ve been investigating. Forward-payoff: when Crocodile is canonically revealed as Mr. 0 (Ch. 155+) and as a Shichibukai (Ch. 155+), this Ch. 114 utterance retroactively keys to the same person.
The grammar — the boss is named before his face is shown, by an ally-of-the-boss to an audience who don’t yet know who he is — is Oda’s preferred reveal-template for high-stakes arc-villain installs. The same pattern is used for Doflamingo (named pre-Dressrosa), Kaido (named pre-Wano), Imu (silhouetted Reverie).