Foundation garment replaced in the right closet (7)
I believe the answer is:
corslet
'foundation garment replaced in' is the definition.
I can't tell whether this definition defines the answer.
'right closet' is the wordplay.
I cannot quite understand how this works, but
'right' could be 'r' (common abbreviation) and 'r' is found within the answer.
an anagram of 'closet' is 'coslet' which is located in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'the' acts as a link.
Can you help me to learn more?
(Another definition for corslet that I've seen is " Piece of armour".)