Abandon at the beach (6)
I believe the answer is:
strand
This clue is a double definition.
'abandon' is the first definition.
(I know this)
'the beach' is the second definition.
(I've seen this before)
'at' is the link.
(Other definitions for strand that I've seen before include "Maroon - thread" , "Abandon on the seashore" , "Thread - London street" , "Run aground, beach" , "Maroon - filament" .)