Clue: You might have set foot in this bit of West Yorks (and, also, its castle) (6)
Answer: SANDAL
Explanation: Definition: You might have set foot in this
 Triple definition (well, almost, the place – a suburb of Wakefield – and the castle being the same name) *As Gaufrid points out, it's also hidden in yorkS AND ALso, so the middle definition probably doesn't apply, but the clue is an &lit – very clever