Clue: In horror, one left disheartened by unfinished home in new town (6,6)
Answer: MILTON KEYNES
Explanation: In horror, one left disheartened by unfinished home in new town (6,6)
I am puzzled here: it seems to be a charade of MILTONKEY, an envelope ('in') of I ('one') plus LT ('**L**ef**T **disheartened') in MONKEY ('horror'); plus NES[t] ('home') minus its last letter ('unfinished'), but the connection between MONKEY and 'horror' seems tenuous at best – describing a child as a monkey seems much more indulgent than as a horror, but I cannot see anything closer.