Paradise in secluded England (4)
I believe the answer is:
eden
'paradise' is the definition.
(synonyms)
'in secluded england' is the wordplay.
'in' says the answer is hidden in the clue.
'EDEN' can be found hidden inside 'secluded england'.
(Other definitions for eden that I've seen before include "The - - Project, Cornwall" , "Place of unspoiled beauty" , "Paradise - ex-PM" , "Genesis garden" , "Adam and Eve's garden" .)