Framework made of, primarily, seasoned wood (4)
I believe the answer is:
sash
'framework' is the definition.
(I know that sash is a type of framework)
'primarily seasoned wood' is the wordplay.
'primarily' indicates taking the first letters.
'wood' becomes 'ash' (wood from an ash tree).
The first letter of 'seasoned' is 's'.
's'+'ash'='SASH'
'made of' acts as a link.
(Other definitions for sash that I've seen before include "Sliding window frame" , "Waistband - type of window" , "Broad band, the one me father wore?" , "(Uniform) strip; window-frame" , "Ribbon worn over the shoulder" .)