### Clue: Drifter on bar, overly sensitive type (9)
### Answer: SNOWFLAKE 
 ### Explanation: Definition: overly sensitive type
 SNOW(precipitation that could be blown by wind to form drifts/heaps/piles) **placed above**(on, in a down clue) FLAKE(a brand of chocolate bar made by Cadbury).
Answer: … was also a chocolate bar made by Cadbury but since discontinued.