### Clue: Initially, arty Roaring Twenties design embracing chrome ornamentation! (3,4)
### Answer: ART DECO 
 ### Explanation: Initially, arty Roaring Twenties design embracing chrome ornamentation! (3,4)
First letters ('initially') of '**A**rty **R**oaring** T**wenties **D**esign **E**mbracing **C**hrome **O**rnamentation', &lit.