Word: logjam
An excess of logs being conveyed on a river, so that their motion halts.
A clog or such jam or mess that halts or greatly delays progress. Example: A step forward for the minimum wage increase this afternoon, as the Senate cleared the logjam of the Republican filibuster. http//www.dailykos.com/storyonly/2007/1/30/13150/5672
You can find a list of possible crossword clues for LOGJAM below.