Here are the possible solutions for cooking show producer's facetious title for an episode in which an attractive restaurateur demonstrated borscht clue
Answer
Clue
Relevancy
beautyandthebeet
Clue
Cooking-show producer's facetious title for an episode ... in which an attractive restaurateur demonstrated borscht?
beets
Clue
Borscht base (borscht is a delicious soup I know how to cook)
Definition
BEET, to improve or mend, esp. a fire
preparationhen
Clue
Episode title for a cooking show featuring chicken recipes?
qed
Clue
Which was to be demonstrated
Which was to be demonstrated (legalese)
"That which was to be demonstrated," in proofs
password
Clue
Game show on which Oscar gave the clue "Aristophanes" and Felix correctly answered "Ridiculous," on an "Odd Couple" episode
Definition
a secret word that must be given to gain admission