AT Your Convenience 
Certain artist’s forte   SCAM
Site site   WEB
Theme: intrusive AT (so maybe it’s an inconvenience)
South-of-the-border political assent?   SISISEN
ATOR
Dishonest Yankees?   BRONXCHE
ATERS
A lifetime at the North Pole?   SANTAF
ATE
Amusement park for fans of flowing music?   LEG
ATOLAND 

While this offering lacked the enjoyable twists other Sunday puzzles offer, it has a wide variety of subject matter that makes it most enjoyable.  I particularly appreciated the reference to a truly great aria, “Una furtiva lagrima.”  That plus Legoland is amusing. 

Time after 
tarde   NOCHE [tarde is not commonly known by speakers of English as afternoon, so I’d use NOCHE, which is more well known, in a song title or simply as “Night in Seville.”
RATING:  
 
 
 Three grins = Excellent: Loved it; Two grins = Good: Enjoyed it; One grin = Satisfactory: A bit bland for my taste; One teardrop = Unsatisfying: No fun