Maroon seashore (6)
I believe the answer is:
strand
I believe this clue is a double definition.
'maroon' is the first definition.
('strand' can be a synonym of 'maroon')
'seashore' is the second definition.
(thesaurus)
(Other definitions for strand that I've seen before include "Piece of yarn etc - London street" , "Leave aground -- length of thread" , "Stretch of sand" , "that may be found by the sea" , "Margin by a beach" .)