Stout and Thin 
Rite site   ALTAR
Shooter’s setting   FSTOP
Gator tail?   ADE
Made a jumper, maybe   SEWED [not a basketball shot]
What Nixon and Kennedy have in common?   ENS
No voter   ANTI
Buck passer, briefly   ATM
Theme: subtract an S and add an H to a word in a phrase
Compliment to a young genius?   WHYYOULITTLETHINKER [stinker]
Nonsense talk from an inner city?   GHETTOBLATHER [blaster] 

 Stout and Thin   Aside from “stout” and “thin” having the S-T-H of the theme, the title’s cleverness eludes me.  Would "state and think" work?
Who knew?SPICA is a star in Virgo
BADBOY is a Diddy label, or that Diddy had a label
RATING:   
 
 
 Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun