Here are the possible solutions for that's what they all clue
Answer
Clue
Relevancy
doh
Clue
"Yeah, that's what they all say. They all say ___": Chief Wiggum
Definition
a musical note
soare
Clue
"__ they all, all honourable men": "Julius Caesar"
eggs
Clue
They're all they're cracked up to be
Definition
EGG, to incite
tba
Clue
Letters the Bluths put on the invitation to a fundraiser they couldn't think of a good cause for, which eventually became the fake disease they used to pocket all the donation money, on "Arrested Deve
udders
Clue
They're milked for all they're worth
abie
Clue
"___ Baby" (song that begin "Yes I's finished on y'all farm land with yo' boll weevils and all")
acme
Clue
Be-all and end-all
Definition
(Greek) the highest point
aday
Clue
Neil Diamond "___ that's all wrong looks all right"