Timber of popular choice (5)
I believe the answer is:
larch
'timber' is the definition.
(I've seen this before)
'of popular choice' is the wordplay.
'of' indicates the answer is hidden within the clue.
'LARCH' is hidden in the letters of 'popular choice'.
(Other definitions for larch that I've seen before include "Supplier of timber" , "wood" , "Coniferous tree with deciduous bright green needles" , "Deciduous conifer" .)