If you delete the instruction text, there's no font left to change colour...

In any event, Word doesn't have an event to trap to tell it that you've clicked on something. What you could do is to add the instructions to a formfield or content control (depending on what you're using), with an 'on entry' macro that toggles the content's display.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]