The word "dilettante" refers to someone who is an amateur or someone who has little to no knowledge or experience in a specific area. In the given sentence, it means that the president of the club is inexperienced and has never held a leadership position before. So, the correct answer is "amateur."
To determine the meaning of the bold underlined word, dilettante, we can use context clues. In this sentence, it is mentioned that the president of the club has never been in a leadership position before. The word dilettante is used to describe this individual. Since the president has never been in a leadership position before, it would suggest that a dilettante is someone who is not experienced or knowledgeable in a particular field or activity. Based on this information, we can conclude that the correct meaning of dilettante is an amateur.