### Clue: It is home for a doctor who travels backwards (6)
### Answer: TARDIS 
 ### Explanation: Definition: It is home for a doctor who travels backwards
 'TIS(contraction of "it is") **containing**(home for) [A + **reversal of**(… who travels backwards) DR(abbrev. for "doctor") ].
Answer: The police box that is home for TV's Doctor Who, who travels backwards (and forwards) in time. A nicely done WIWD (wordplay intertwined with defn.) clue.