### Clue: Most trendy carbon spectacles in case (7)
### Answer: COOLEST 
 ### Explanation: Definition: Most trendy

C (carbon) + OO (pair of "spectacles", in cricket) + LEST ("in case")
 

 
*In cricket, if a batsman is out for a duck in both innings, it is called a "pair" because OO resembles a pair of spectacles.