Stoat in new post (7)
I believe the answer is:
station
'post' is the definition.
(I know that post can be written as station)
'stoat in new' is the wordplay.
'new' is an anagram indicator.
'stoat'+'in'='stoatin'
'stoatin' with letters rearranged gives 'STATION'.
(Other definitions for station that I've seen before include "Fixed stopping place for transport" , "Building where service is based, fire or train" , "eg Paddington" , "TV or radio channel" , "Place of duty, work" .)