### Clue: Extremely staunch worker with international body, good material (8)
### Answer: SHANTUNG 
 ### Explanation: Definition: material
  SH(first and last letters,extremely of "staunch") ANT(worker) UN($$U$$nited $$N$$ations,international body) G($$g$$ood)
Defn:  Originally, a coarse (having a knobbly surface) fabric,material woven from raw silk, made in Shantung (Shandong) province in North East China.  Nowadays, it also means a cotton or rayon fabric imitating it.