### Clue: One swallowing tablet and rubbish synthetic material (7)
### Answer: ACETATE 
 ### Explanation: Definition: synthetic material
 ACE(one, derived from the playing card with the value of 1) **containing**(swallowing) [ E(slang for the drug Ecstasy, which is taken in the form of a tablet/pill) + TAT(rubbish/tasteless clothes, jewellery or ornaments) ].