Kind of wood in the Bible supposed to be cypress (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
gopher
(Other definitions for gopher that I've seen before include "Burrowing animal - kind of wood" , "biblical wood" , "American burrowing rodent or ground squirrel" , "Some say this made the Ark" , "Method of teaching reading by sounds" .)