Home rule decentralised in this place (4)
I believe the answer is:
here
'in this place' is the definition.
(synonyms)
'home rule decentralised' is the wordplay.
'home' becomes 'he' (I am not sure about this - if you are sure you should believe this answer much more).
'decentralised' suggests removing the centre (the centre of the word is removed).
'rule' with its middle taken out is 're'.
'he'+'re'='HERE'
(Other definitions for here that I've seen before include "final clue?" , "The present location" , "In attendance" , "Present; I say!" , "To hand" .)