“I think if I have any talent at all, it’s for picking good guys to play with to make me sound good,” Jon Cleary says, then laughs and takes another sip of his tea. The Grammy-winning pianist, vocalist and composer still retains that ritual of his British birthplace, though musically he’s long fully embraced the sounds of New Orleans, his residence since 1981. Cleary stands as the keeper of the flame in the remarkable lineage of pianists such as Professor Longh...