As a detective solving the mystery of the crossword clue ‘Remoulade ingredient‘, my thought process led me to consider the common elements that make up this popular condiment. Remoulade typically includes ingredients like mustard, capers, herbs, and often mayonnaise. Therefore, I began to consider the most likely candidate – mayo. Not only is it a common ingredient in remoulade, but it also fits the criteria of the crossword clue. As I continued to ponder this solution, it became clear that mayo is a versatile ingredient that complements many dish types and adds a creamy, delicious texture to sauces and dressings. With the help of my savvy sleuthing skills, I was able to uncover the answer to this puzzling crossword clue – Mayonnaise!