1. Walls or jetties built out from riverbanks or seashores to control erosion (7)
G * O * i * S
2. Loud confused noises, as of a crowd; commotion (7)
* * M * L * S
3. In architechture, an ornament of three arcs set in a circle (7)
* * * * O * L
4. A pasta sauce made from basil leaves, pine nuts , garlic. oil and parmesan cheese (5)
* * * T *