THEME:   none   
GOOD ONES:     "Piano is not my forte," e.g.   PUN [a pianoforte is the original name of a piano --- still used in Italian]   
Meter starter   PERI [not a coin]   
Blue books?   PORNO [blue is a term for smut; blue books are exam booklets]   
Opening numbers?   AREA CODES [not songs]   
Pepper trio?   PEES   
Price support?   BRAVA [cheers for diva Price]   
A virus may cause one   FATAL ERROR [I though flu, etc. probably because I consider computers relatively recent phenomena]      
BTW:   Crossing FRANK GEHRY with ARHAT, while fair, is a bit sadistic.      
ENOW   I studied 
Macbeth but didn't know the quote; a better clue might be "Enough for Shakespeare."         
RATING: 
 
  
   Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun