A horse’s crippled on the beach (6)
I believe the answer is:
ashore
'on the beach' is the definition.
(I've seen this in another clue)
'a horse's crippled' is the wordplay.
'crippled' is an anagram indicator.
'horse' with letters rearranged gives 'shore'.
'a'+'shore'='ASHORE'
(Other definitions for ashore that I've seen before include "Toward land from water" , "on terra firma" , "Returned to land" , "Off the boat" , "Aground" .)