Where young Simpson has a little house (6)
I believe the answer is:
hobart
'a little house' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'where young simpson' is the wordplay.
'where young' becomes 'ho' (I can't justify this - if you can you should give a lot more credence to this answer).
'simpson' becomes 'bart' (Bart Simpson, The Simpsons character).
'ho'+'bart'='HOBART'
'has' acts as a link.
Can you help me to learn more?
(Other definitions for hobart that I've seen before include "Tasmanian capital" , "Tasmanian city" , "Capital city of Tasmania" , "Australian city" , "Destination of an annual yacht race starting at Sydney" .)