Bring up a plank of wood (5)
I believe the answer is:
balsa
'wood' is the definition.
(type of wood)
'bring up a plank' is the wordplay.
'bring up' says the letters should be written backwards.
'plank' becomes 'slab' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'a'+'slab'='aslab'
'aslab' written backwards gives 'BALSA'.
'of' is the link.
Can you help me to learn more?
(Other definitions for balsa that I've seen before include "Tropical American tree" , "lightweight boat-builder" , "Tree with light soft wood" , "Lightweight timber" , "Something light" .)