doubt

dear groups,
i have a doubt in sql,
i have a table staff_skills in which i have set a table level
constraint to create a primary key of two fields .
so 'name' and 'skill' combinedly forms a primary key.
now the issue is in another table i have only 'name' field and i want
to create a foreign key constraint which refers the staff_skills table's
'name' field only.
staff_skills (table) - name,skill,ability (columns) --- primary
key(name,skill)
staff_xxxx (table) - name,x,y,z (columns) --- foreign
key(name) references staff_skills(name).
how to do the above?
your immediate reply will be helpful
yours sincerely
SathishKumar.S