Out of its tree, seek bird that’s observed by the road (8)
I believe the answer is:
kerbside
'observed by the road' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'out of its tree seek bird' is the wordplay.
'seek bird' anagrams to 'KERBSIDE'.
Though, I am not clear how the anagram is indicated.
'that's' is the link.
Can you help me to learn more?
(Other definitions for kerbside that I've seen before include "where solicitors may work" , "Part of road by the pavement" , "Edge of a road" , "Pavement edge" .)