a better way to phrase having "blues" would be, "I have the blues." or "I'm feeling blue."  Also don't start sentences with "and" or "but". 

To answer your question, I play my guitar I find that very relaxing. 

What they're saying is to "clear" the area. When they use a defibrillator anyone touching the patient can get electrocuted. they say clear so no one touches the person getting the electricity. I hope this helps.

Relieve "I want to go to the gym to relieve some stress" So this person is wanting to go workout to lower their stress level. "I'm going to relieve you at 0600 tomorrow morning" This person is going to release them or replace them from their work, post, etc at the given time Allay "Having a dog can allay your fear of being robbed." It means that it's diminishing or reducing the fear Mitigate "I take Tylenol to mitigate my knee pain when I run" This person take medicine in an attempt to make the pain less in their knee during exercise Reduce "I want to reduce the amount of time I spend on the computer." This person wants to spend less time on the computer. Lessen "If you use proper form it will lessen the chance of injury." Reduce and lessen are very similar and can usually be used interchangeably. I hope this helps!

If you're having a conversation with someone avoid dead end questions. You'll want have the person elaborate on whatever is asked. Don't let the conversation die out with yes or no answers and questions.