THEME:   last letter(s) of a two-word phrase read with the first letters of the second word spell the name of a bird   
GOOD ONES:     Signs of spring {& theme}   NESTING BIRDS [they are nestled in the phrase]   
Canine coat?   ENAMEL [tooth]   
Couple maker   AND [I first had TWO]   
Base path?   EVIL [note two words]   
Downed with a jolt   TASED [I thought whiskey, etc.]   
Series ender   ET AL [not the World Series]   
Apple product   SEEDS [not I-Pod]      
BTW:   Where texts are often read   CELL [even after I wrote the word I thought it meant prison cell not phone]      
"Be My Baby" singers   THE RONETTES [one of my favorite R&R songs --- group was named for lead singer Ronnie Spector, wife of arranger Phil Spector now in prison for murder]   
https://www.youtube.com/watch?v=2g_FD_sYazk       Mark made a particularly good puzzle with (aside from the clever clues noted above) many unusual clues for ordinary words, a wide variety of subject matter, and a clever theme appropriate for the time of year.         
RATING: 
 
  
  
   Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun