### Clue: Doctor Who crashed into tree, light being made of it? (9)
### Answer: TORCHWOOD 
 ### Explanation: Definition: tree, light being made of it
 **Anagram of**(… crashed) DOCTOR WHO.
Answer: Any of similar trees, whose wood is used for making torches.
"Torchwood" is a TV series spun off from "Doctor Who", and, apparently, the producers had the same idea of making an anagram out of the latter title.