
1) French sauce 2) Garlic dish
Found on
https://www.crosswordclues.com/clue/pistou

a paste made of basil, olive oil, garlic, and sometimes cheese, equivalent to the Italian pesto. A specialty from Provence.
Found on
http://chocolateandzucchini.com/french-english-food-glossary/

Pistou, or pistou sauce, is a Provençal cold sauce made from cloves of garlic, fresh basil, and olive oil. It is somewhat similar to pesto, although it lacks pine nuts. Some modern versions of the recipe include grated parmesan, pecorino or similar hard cheeses. A somewhat similar sauce is Argentine chimichurri made with parsley. ==Etymology== Tr...
Found on
http://en.wikipedia.org/wiki/Pistou

sauce of basil, garlic, and olive oil; specialty of Provence. Also a rich vegetable, bean, and pasta soup flavored with pistou sauce.
Found on
http://www.patriciawells.com/glossary/

sauce of basil, garlic, olive oil; also a rich vegetable soup
Found on
http://www.slowtrav.com/france/restaurants/glossary.htm
No exact match found.