That was the entire reason why Sollozzo wanted Vito's backing.
So Sollozzo WAS "that clevah"
...except when he was eating veal...
I believe in that scene he was the hunted one
He was the hunted one, and he wasn't eating veal, he was drinking wine McCluskey was eating the veal, and as I have mentioned previously that restaurant served the veal as quickly as that Cardinal got Mike his orange juice.
"Io sono stanco, sono imbigliato, and I wan't everyone here to know, there ain't gonna be no trouble from me..Don Corleone..Cicc' a port!"