Place fit for dog (6)
I believe the answer is:
plague
'dog' is the definition.
(I've seen this before)
'place fit' is the wordplay.
'place' becomes 'pl' (I've seen this in other clues).
'fit' becomes 'ague' (I've seen this before).
'pl'+'ague'='PLAGUE'
'for' acts as a link.
(Other definitions for plague that I've seen before include "Pestilence transmitted by rat fleas" , "Annoy continually" , "Contagious disease with a high death rate" , "Badger" , "Epidemic diseases with high mortality" .)