What's the term for when a phrase is slightly changed for effect?
Solution 1:
Phrasal template seems to be the best term for it. "McDonald's _____ Menu" is the template in that example, where any currency could be used to fill in the blank.
However,
Clean Air Guitar Act
is an example of a different type of wordplay, and not the same device as the "Yuan Menu". This is important because the distinction is that the "Yuan Menu" isn't using similar terms meant to be humorous, it's just to fit the McDonald's template.