The term 'ONE IN A PACK' can be broken down into three crossword solutions: CIG (3 letters), ACE (3 letters), and LIE (3 letters). CIG stands for cigarette, which is a thin cylinder of finely cut tobacco leaves rolled in thin paper for smoking. ACE is a playing card with a single pip or symbol on it, ranking highest in its suit. Lastly, LIE is an intentionally false statement made by someone in order to deceive. Therefore, the phrase 'ONE IN A PACK' can be interpreted as a unique individual among a group, or something that stands out from the rest.