Here on the Green somewhere near Lewisham (6)
I believe the answer is:
hither
'here' is the definition.
(synonyms)
'on the green somewhere near lewisham' is the wordplay.
'on' indicates putting letters inside (as in clothing 'on' a person).
'green somewhere near lewisham' becomes 'hir' (I can't justify this - if you can you should believe this answer much more).
'the' placed within 'hir' is 'HITHER'.
Can you help me to learn more?
(Other definitions for hither that I've seen before include "Towards this place - not yonder" , "Here (arch)" , "In this direction" , "all over the place - 13a,25a,16d,15d" , "To this place of old" .)