THEME:   I have no idea because my newspaper didn't print the top two rows, including the whole title and several clues.  This made solving it difficult but not impossible.  [I could go on line, but maybe later.  And there's a site which deconstructs these puzzles daily.  L.A. Times Crosswords (something)]
   
GOOD ONES:     
Cold mold   ASPIC   
Chihuahua greeting   ARF   
Ask for a hand?   PROPOSE [still get a kick out of this idiom]   
Key material   EBONY   
   
BTW:   
Hebrew leaders?   ALEPHS [clever clue, if you happen to know Hebrew.  Why the word appears in Webster's is mysterious.  Am I an anti-Semite?]   
   
CAPA is not used in English. [Am I a xenophobe?]   
   
   
RATING:  not qualified to assess, but regardless of the theme I enjoyed the puzzle. 
Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun