### Clue: Pearly king no use working with chartered accountant (8)
### Answer: NACREOUS 
 ### Explanation: Definition: Pearly
 **Anagram of**(… working …) [ R(abbrev. for "Rex"/king) + NO USE **plus**(with) CA(abbrev. for "chartered accountant") ].
Answer:  Not just describing pearls, but also certain cloud formations.