Seaside attraction ripe for redevelopment (4)
I believe the answer is:
pier
'seaside attraction' is the definition.
(I've seen this before)
'ripe for redevelopment' is the wordplay.
'for redevelopment' indicates anagramming the letters (I've seen this in other clues).
'ripe' is an anagram of 'PIER'.
(Other definitions for pier that I've seen before include "Seaside platform" , "Break-water or landing stage" , "such as you might see at the seaside" , "Landing stage; arch support" , "Wharf jutting out into water" .)