### Clue: Temperamental supercomputer captures twp (sic) bytes (6)
### Answer: CRABBY 
 ### Explanation: Definition: Temperamental
  CRAY(*supercomputer*, actually the name of the company that makes them, named after its founder) around(*captures*) BB(*two bytes*, 1 byte = B).  I'm quite sure that "twp" is a typo.