10a. Location for a job (9) S???A???N
7d. Give orders to speak for the board (11) ???E???????
6d. Sounds like the chief fundamental truth (9) P?????D??
18a. Russian timber belt provides this tree (7) ??D????
Thanks folks, that means I have one wrong!! 16a is "He deals in the material things of life" I had TRADER, but of the D is wrong I'm left with ?R?P?R if Principle is the answer to 6d!!