The term 'SOUND OF A LEAK' can be broken down into three crossword solutions: SSSS (4 letters), DRIP (4 letters), and SSS (3 letters). The first solution, SSSS, is an onomatopoeia for the sound of a leak, which is usually a slow and steady dripping noise. The second solution, DRIP, is another way to describe the sound of a leak, as it is the sound of liquid slowly falling from a surface. The third solution, SSS, is a shortened version of the onomatopoeia for the sound of a leak, which is often used in literature and poetry to describe the sound of a leak.