A seed scattered around plot in seaside walk (9)
I believe the answer is:
esplanade
'seaside walk' is the definition.
(I've seen this before)
'a seed scattered around plot' is the wordplay.
'scattered' indicates anagramming the letters.
'around' means one lot of letters goes inside another.
'plot' becomes 'plan' (I've seen this before).
'a'+'seed'='aseed'
'aseed' with letters rearranged gives 'esade'.
'esade' enclosing 'plan' is 'ESPLANADE'.
'in' is the link.
(Other definitions for esplanade that I've seen before include "Seaside resort walk" , "Seaside walkway" , "Walkway beside the seashore" , "Seaside walking area" , "Long level area for walking beside the sea" .)