Express view in old wood (5)
I believe the answer is:
opine
'express view' is the definition.
'old wood' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'wood' becomes 'pine' (pine is a kind of wood).
'o'+'pine'='OPINE'
'in' is the link.
(Other definitions for opine that I've seen before include "Suppose" , "Hold forth" , "Express a point of view" , "Suggest" , "State as one's opinion" .)