D-Day beach (5)
I believe the answer is:
omaha
'd-day beach' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for omaha that I've seen before include "US city; D-Day 16" , "State [CITY!!!]" , "Where American may work" , "Cotton fabric used for curtains and upholstery" , "- - Beach (WWII)" .)