… but a few too many blocks for a themeless: IMO [see 25-Across] Candy vehicle
SCTV [John Candy starred in “Second City TV”]Gone crackers?
HIHOS [never knew they were here --- were they crackers or cookies?]Initial response to a yenta
MYOB [mind your own business, in texting]Part of PSI?: Abbr.
LBS [are the ? and Abbr. needed?]Heavy hitter
SLEDGE [I thought baseball, naturally]Business intro.?
Jewish cast today with BOBDYLAN, Roman Polanski, yenta, and GELT TETES
Three grins = Excellent: Loved it; Two grins = Good: Enjoyed it; One grin = Satisfactory: A bit bland for my taste; One teardrop = Unsatisfying: No fun