Own new refuge (5)
I believe the answer is:
haven
'refuge' is the definition.
(I know that haven is a type of harbor)
'own new' is the wordplay.
'own' becomes 'have' (synonyms).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'have'+'n'='HAVEN'
(Other definitions for haven that I've seen before include "Small port, refuge" , "Sheltered port" , "relaxing place" , "Safe port" , "Anchorage - retreat" .)