"Now I see!"

AHA

That sudden flash of understanding often comes with this two-syllable exclamation.

The exclamation "Now I see!" is a classic way to express sudden realization, and "AHA" perfectly captures that moment of clarity. It’s a straightforward definition where the answer mimics the sound people often make when something clicks—like solving a puzzle or spotting a hidden detail. No wordplay here, just a direct match between the clue’s meaning and the answer’s common usage.