The five words below can be preceded by five related words to make five familiar phrases. The relation of the first four answer words is revealed by #5.

1. __________ LIGHT
2. __________ BOARD
3. __________ COLUMN
4. __________ QUESTION
5. __________ INTERESTS

Answers:

1. GUIDING light
2. RUNNING board
3. STEERING column
4. LEADING question
5. CONTROLLING interests 

Credit:
Doug Peterson