Disclose what one has to do to a dress that's too tight (3,3)
I believe the answer is:
let out
'disclose' is the definition.
(synonyms)
'what one has to do to a dress that's too tight' is the wordplay.
I cannot quite see how this works, but
'to' is present in the answer.
'do' could be 'ut' (synonyms) and 'ut' is located in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for let out that I've seen before include "Release from prison or loosen garment" , "Escape clause" , "available for rent?" , "An opportunity to escape from a fix" , "Way of escape" .)