The raging river next to state lodge (9)
I believe the answer is:
gatehouse
'lodge' is the definition.
(thesaurus)
'the raging river next to state' is the wordplay.
'raging' indicates anagramming the letters.
'river' becomes 'ouse' (Yorkshire river**).
'next to' is a charade indicator (letters next to each other).
'state' becomes 'ga'.
'the' anagrammed gives 'teh'.
'teh'+'ouse'='tehouse'
'tehouse' after 'ga' is 'GATEHOUSE'.
(Other definitions for gatehouse that I've seen before include "Lodge" , "underneath Barbican" , "porter's place?" , "It guards entry to an estate" , "Building by entrance" .)