Lively new routes to east of French wood (10)
I believe the answer is:
boisterous
'lively' is the definition.
(thesaurus)
'new routes to east of french wood' is the wordplay.
'new' is an anagram indicator.
'to east of' says to put letters next to each other (some letters go to the right of others).
'french wood' becomes 'bois' ('wood' in French).
'routes' is an anagram of 'terous'.
'terous' put after 'bois' is 'BOISTEROUS'.
(Other definitions for boisterous that I've seen before include "rollicking" , "Noisy and lively" , "Exuberant" .)