ON ''Voodoo'' (Black Saint/ Polygram), the Sonny Clark Memorial
Quartet has something original to say about Sonny Clark, the
modern jazz pianist and composer who died in 1963 at the age of
31. A cult following has build up around Sonny Clark's recorded
work, much of it among fans of be-bop and the hard-bop sessions
associated with Blue Note Records, the label that recorded Mr.
Clark most frequently. But the Sonny Clark Memorial Quartet was
assembled by Wayne Horvitz, a downtown keyboard player known for
his partly-electronic solo albums and his work with
''deconstructionist'' ensembles like Curlew and John Zorn's
performing groups. Mr. Zorn himself is on alto saxophone, and
the drummer, Bobby Previte, is also associated with the downtown
avant-garde. Only the bassist, Ray Drummond, has ''jazz
credentials'' in the conventional sense.  There haven't been
many clues in the music of Mr. Horvitz and Mr. Zorn that music
like Sonny Clark's would hold some special meaning for them. But
it's hard to forget running int