Clue: J. Ben-Hur once grabs American with both hands in dance (10)
Answer: CHARLESTON
Explanation: Definition: dance
 C. HESTON(or Charlton Heston, actor who once played the character Judah Ben-Hur or J. Ben-Hur) **containing**(grabs) [ A(abbrev. for "American") + R,L(abbrev. of, respectively, both right and left hands) ].