Tropical hardwood (5)
(Other definitions for ebony that I've seen before include "hard stuff" , "Very dark brown" , "Wood - Boyne (anag)" , "'Hard, dark wood (5)'" , "Heavy hard wood, usually black" .)
'tropical hardwood' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for teak that I've seen before include "Hard wood used for furniture" , "Quality timber" , "Take away with very hard wood" , "Take to the hardwood" , "Hardwood found naturally in the Far East" .)
(Other definitions for mahogany that I've seen before include "Log" , "Type of wood" , "tree" , "Reddish-brown hardwood" , "Dark wood" .)