Yes. Clemenza had proven his loyalty to Michael, and he was too old to have big ambitions on his own. Michael probably kept him on a long leash, so that Clemenza, on a day to day basis, was more or less like a Don.
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.