"the change" and "change" both make sense, but the former is more natural to me in this situation. This meaning of "change" is uncountable, so "a change" is never right. "some change" is also possible.
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CliveThis sounds like you are think the clerk is incompetent.Yeah, you do have a point ...
CliveCustomer: gives money, Clerk gives change.Clive, but I can say 'Clerk gives THE change', right?