THEME:   second letter of a phrase is doubled to create a different phrase
   GOOD ONES:     
Marshmallow that's been toasted too long?   GOO UP IN FLAMES   
Response to  drone   YAWN [already I'm thinking flying machines]   
Zeus' beginning?   ZETA   
It might blow up in a crash   AIRBAG   
Shade at the shore   AZURE   
Socket set   EYES [I thought wrenches]      
BTW:   Joe sans jolt   DECAF [I thought Joltin' Joe DiMaggio --- who oddly sold Mr. Coffee]      
Gave notice   QUIT [not the way I see it; the notice is the intention to quit --- still committed to work there for some time]      
Enero is not used in our language, but for some reason it is used often in Xwords (must be the vowel/consonant configuration)      
RATING: 
 
  
  
   Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun