Keep funny dialect (7)
I believe the answer is:
citadel
'keep' is the definition.
(thesaurus)
'funny dialect' is the wordplay.
'funny' indicates an anagram.
'dialect' is an anagram of 'CITADEL'.
(Other definitions for citadel that I've seen before include "Highly-secure building" , "Stronghold into which people could go for shelter during a battle" , "Bastion" , "Stronghold (of the Salvation Army?)" , "place of refuge" .)