Coastal strip (8)
(Other definitions for seashore that I've seen before include "Strand, beach" , "Coastal land's edge" , "Coast, of an ocean say" , "Coast, stand" , "Nautical cry" .)
'coastal strip' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for littoral that I've seen before include "coastal zone" , "Pertaining to the coast" , "Tortilla found in region by the shore" , "sandy area?" , "seashore" .)