Tree climbed next to golf club (8)
I believe the answer is:
rosewood
'tree' is the definition.
(rosewood is a kind of tree)
'climbed next to golf club' is the wordplay.
'climbed' becomes 'rose'.
'next to' says to put letters next to each other.
'golf club' becomes 'wood' (I've seen this before).
'rose'+'wood'='ROSEWOOD'
(Other definitions for rosewood that I've seen before include "It resembles mahogany" , "Material for violins, etc" , "One [TYPE OF TREE]" , "material for carpenter" , "Timber used in cabinetmaking -- or so do we (anag)" .)