Here it is,
Multi-Table Cluster by Hash
CREATE CLUSTER <schema_name>.<cluster_name> (
<cluster_key_column_name> <data_type> <SORT>)
PCTFREE<integer>
PCTUSED <integer>
INITRANS <integer>
MAXTRANS <integer>
SIZE <integer><K | M | G | T>
TABLESPACE <tablespace_name>
INDEX
<SINGLE TABLE>
HASHKEYS <integer>
HASH IS <expression>
PARALLEL <integer>
<NOWROWDEPENDENCIES | ROWDEPENDENCIES>
<CACHE | NOCACHE>;
Multi-Table Cluster by Index
CREATE CLUSTER <schema_name>. <cluster_name> (
<cluster_key_column_name> <data_type> <SORT>)
PCTFREE<integer>
PCTUSED <integer>
INITRANS <integer>
MAXTRANS <integer>
SIZE <integer><K | M | G | T>
TABLESPACE <tablespace_name>
INDEX
<SINGLE TABLE>
HASHKEYS <integer>
HASH IS <expression>
PARALLEL <integer>
<NOWROWDEPENDENCIES | ROWDEPENDENCIES>
<CACHE | NOCACHE>;