Ron returning with girl to identify place of D-Day landings (8)
I believe the answer is:
normandy
'place of d-day landings' is the definition.
(I know this)
'ron returning with girl' is the wordplay.
'returning' says the letters should be written in reverse.
'with' says to put letters next to each other.
'girl' becomes 'mandy' ().
'ron' in reverse letter order is 'nor'.
'nor'+'mandy'='NORMANDY'
'to identify' acts as a link.
(Other definitions for normandy that I've seen before include "North France region" , "French province on the Channel" , "over the water" , "Region of NE France bordering on English channel" , "Region of NW France bordering on English Channel" .)