Express the view there is nothing on the tree (5)
I believe the answer is:
opine
'express the view' is the definition.
'opine' can be an answer for 'express' (I've seen this in another clue). I'm not sure about the 'the view' bit.
'nothing on the tree' is the wordplay.
'nothing on' becomes 'o' (I've seen this in other clues).
'the tree' becomes 'pine' (pine is a kind of tree).
'o'+'pine'='OPINE'
'there is' is the link.
Can you help me to learn more?
(Other definitions for opine that I've seen before include "Express or hold view" , "Believe" , "State as one's opinion" , "Express a point of view" , "Suggest" .)