Female underwear (8)
'female underwear' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for lingerie that I've seen before include "frillies" , "Fancy underwear for women" , "Garments" , "Women's underwear from France" , "Ladies' underwear" .)
(Other definitions for knickers that I've seen before include "bother" , "Underwear - oh dear!" , "Drat!" , "Mild expletive" , "Elasticated undergarment" .)