The term 'HELPFUL ONE' can be broken down into three crossword solutions: AIDER (5 letters), DOLL (4 letters), and GOODSAMARITAN (13 letters). An aider is someone who helps or assists another person, while a DOLL is a figure of a human being, usually made of cloth or plastic. The term 'good samaritan' refers to someone who helps others in need without expecting anything in return. All three terms refer to someone who is helpful and kind to others.