### Clue: Stumped by corset? There's a surprise! (6,2)
### Answer: STROLL ON 
 ### Explanation: Definition: There's a surprise
A charade of ST ('stumped', cricket) plus ROLL-ON ('corset'). I would like to think that a stroll on is a theatrical term for an actor making an unbilled appearance – hence the surprise – but I can track down no justification for this.