Shockingly green friend, on the whole (9)
I believe the answer is:
generally
'on the whole' is the definition.
(thesaurus)
'shockingly green friend' is the wordplay.
'shockingly' is an anagram indicator.
'friend' becomes 'ally' (I've seen this before).
'green' with letters rearranged gives 'gener'.
'gener'+'ally'='GENERALLY'
(Other definitions for generally that I've seen before include "most of the time" , "In most cases, usually" , "In most cases, as a general rule" , "For the most part" , "as usual" .)