The term 'Cause of Concern at the Polls' can be summarized by the crossword solution 'APATHY, ' which is a six-letter word. APATHY is defined as a lack of interest or enthusiasm, and it is often seen as a cause of concern at the polls because it can lead to low voter turnout. Low voter turnout can have a significant impact on the outcome of an election, as it can lead to a lack of representation for certain groups or interests.