Dog with case of rabidity is mine (8)
I believe the answer is:
colliery
'is mine' is the definition.
(thesaurus)
'dog with case of rabidity' is the wordplay.
'dog' becomes 'collie' (collie is a kind of dog**).
'with' says to put letters next to each other.
'case of' means to remove the middle letters (outsides of).
'rabidity' with its middle removed is 'ry'.
'collie'+'ry'='COLLIERY'
(Other definitions for colliery that I've seen before include "Pit" , "Mining complex" , "Where a coalminer goes to work" , "Coal-mining establishment" , "Coal mine" .)