The word "crack" can have multiple meanings, including producing a sudden sound, breaking open, or understanding a problem. Synonyms for "crack to" could include the words figure out, decipher, unravel, unlock, or comprehend. Additionally, "crack to" could also refer to the action of physically breaking something open, in which case synonyms could include smash, shatter, fracture, or break apart. In a more colloquial sense, "crack to" could refer to someone's ability or talent in a particular area, and synonyms for this usage could include excel, triumph, succeed, or dominate.