A more thorough explanation:

Definition: An exception or reservation.

Example: "I don't usually eat sweets, but I'll make a saving for this special occasion."

Explanation: In this example, the speaker is making an exception to their usual behavior of not eating sweets. They are reserving the right to indulge in this particular situation, which is what is meant by "making a saving."

Example: "The company made a saving in their budget for unexpected expenses."

Explanation: In this example, the company set aside a portion of their budget as a reservation for any unexpected expenses that may arise. This is another way in which the term "saving" can be used to indicate an exception or reservation.