Rue land being redeveloped in Sussex town (7)
I believe the answer is:
arundel
'sussex town' is the definition.
(I've seen this before)
'rue land being redeveloped' is the wordplay.
'being redeveloped' indicates an anagram.
'rue'+'land'='rueland'
'rueland' with letters rearranged gives 'ARUNDEL'.
'in' is the link.
(Other definitions for arundel that I've seen before include "somewhere in W Sussex" , "West Sussex town with a castle" , "Castle in W. Sussex" , "English public school" , "Norfolk seat" .)