### Clue: Stays in fancy place (6)
### Answer: CORSET 
 ### Explanation: Definition: Stays
 COR!(a British exclamation of amazement, etc., similar to "fancy that!") + SET(to place something on something).
Answer: Women's undergarments to make their girths appear smaller, and their chests wider (even less flat?). And they could also prevent overeating – so it all helps.
And as the Doctor and his fans know, it is bigger on the inside.