Come On 
Got in on a deal ANTED
Pottery piece SHARD [sadly]
Theme: ON added to a phase yields another phrase
Milton Hershey, e.g.? CHOCOLATEBARON
Body of brewing rules? BEERCANON
Ancient Germanic singer? ALTOSAXON
Extra, and this puzzle’s title ADDON
Blood___ TYPER [the common phrase is “blood type†so TYPER seems arbitrary as would, say, BLOOD FEUDER or BLOOD BATHER]
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
