Clue: Minor place, like Stevenage? (3-5,4)
Answer: ONE-HORSE TOWN
Explanation: Definition: Minor place, like Stevenage
Steve**nag**e is a TOWN with ONE HORSE (**nag**) in it – *Edit thanks to Andrew, Peter T and muffin* 
~~ONE HORSE=a knight, or a "Minor" piece in chess; plus TOWN="place like Stevenage"~~