Aclarame is the imperative form of the verb aclarar (to clarify) combined with the pronoun me (for me). It means "clarify for me" or "explain to me."
In the song, the artist is pleading for answers, singing "aclarame, me suda si a ti ya no te molesto" (clarify for me, I don't care if I bother you anymore). This word captures the raw emotion and desperation of someone seeking understanding in a confusing situation, making it very impactful.
Have you ever wondered why someone left you, even when you thought everything was perfect? Santa RM's "Por Qué" [Why] featuring Crox and Mudo is a powerful and emotional journey through that exact feeling. The singer is grappling with a breakup, asking endless questions about why his love left him and what he did wrong. He's heartbroken, feeling like his world has ended, and he can't find a reason for her departure.
He remembers the good times they shared, calling them "increíble" [incredible], and expresses how much he misses her. He's desperate for answers, even asking, "dime por qué te marchaste, dime en qué te fallé" [tell me why you left, tell me how I failed you]. Despite the pain and the "mil heridas" [thousand wounds] she left behind, he declares that he will never stop loving her. It's a raw and honest look at the confusion and hurt that comes with a sudden and unexplained breakup.