Possible Title: 
What’s On?Good Ones:End of a court game   ALAI [this kind of clue usually gets a question mark though I like it this way]
Key component   EBONY
Theme: TV show titles the last word of which can join with “ROOM” making a new phrase: GAME, FAMILY, PUBLIC, SHOW
Den, often, {and theme}   TVROOM
Who knew?:Pop songs from the ‘30’s to the ‘70’s is an area of interest of mine, so I knew the title of the song was spelled “Loco-Motion” and that Little Eva, a one-hit wonder, was the singer.  But I didn’t know her last name was BOYD.  Come clean, Steve; did you know that?
Some Nits to Pick:Lancelot’s unrequited lover   ELAINE  [the love is unrequited, not the lover]
Unlike TVROOM, for example, IRESIGN and OLDENEMY and DASHTO are rather random combinations.  “I Quit” is a common phrase and grist for Xwords.  Use of one these random combinations in a puzzle may annoy most purists; three in a puzzle is, as you read this, likely causing our more conservative brethren apoplexy.
RATING:   
 
 
 Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun