THEME:   The long O sound is added to familiar phrases   
GOOD ONES:     "oh, I get it" for the title   
Glass insulation consideration?   WINDOW CHILL FACTOR [wind chill factor]   
Skits at teatime?   PECOE PERFORMANCES [peak performances]   
One known for high living?   TIBETAN [two miles high!]   
Nice view   MER [the city is pronounced with a short I]   
Lab attendants   VETS ["black lab attendants" might be more fun]   
Place for sweaters   SPA      
BTW:   "80's IBM flop nicknamed "Peanut"   PC JR [never knew till now that my first computer was a flop; to me it was a miracle]      
ALMAS no es englais.      
Soup in "That's Amore"   PASTA 
FAZOOL [FAZOOL is not a word here or in Italy; it's 
fagioli --- in the song it is pronounced /fazool/, so the clue should indicate it is the sound, not the word.  
Sfachime!]      
MASH UP crossed with APU is too tough for the un-TV generation unlikely to fans of "The Simpsons" or especially "Glee."         
RATING:    
 
 
Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun