THEME:   WATER  in phrases which are read across and down featuring unnumbered and unclued spaces --- I think   
GOOD ONES:   River phenomena (or what literally happens six times in this puzzle)   WATER + FALLS [literaaly the water falls because they are Down answers]    
Breed canines?   TEETHE   
Scoreless trio?   ESSES [3 s's]   
NYC country club?   THEUN   
Broke ground   HOED            
BTW:   I found this very difficult doing it in the doctor's waiting room this morning (that's why I'm late today.  I do have access to the puzzles a day or so in advance to help in these posts and will attempt to use the service next time.  I prefer solving puzzles by pen rather than by keypad.)  Anyway, it was fun trying to figure out what to do.         
RATING: 
 
 
   Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun