Clever woman has underwear stored away? (8)
I believe the answer is:
brainbox
'clever woman' is the definition.
(a brainbox is a clever person)
'underwear stored away?' is the wordplay.
'underwear' becomes 'bra' (bra is a type of undergarment).
'stored away?' becomes 'inbox' (I am not sure about this - if you are sure you should believe this answer much more).
'bra'+'inbox'='BRAINBOX'
'has' is the link.
(Other definitions for brainbox that I've seen before include "quiz champion?" , "Mastermind" , "Very clever figure" , "Einstein?" , "Very clever person" .)