Sorry guys I need your help again on 23dn...
Timber tree that's very good, almost smooth on the outside(5)
I have I?O?O
I think the given letters are sound, but I'm stumped (forgive the pun!)
Thanks Paul. Iroko didn't make it into my edition of Chambers, and plantations of African Teak are not that well established in Bromley, so I dont feel too bad about my ignorance.