Louisville Slugger wood (3)
I believe the answer is:
ash
'louisville slugger wood' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ash that I've seen before include "Variety of tree" , "Knotty - - (Ken Dodd)" , "-- Wednesday" , "Rowan tree is also called the mountain . . ." , "Tree with keys" .)