Bits covered by these foreign articles? Rubbish! (10)
I believe the answer is:
underpants
'bits covered by these' is the definition.
(genitals or 'bits' are covered by underpants)
'foreign articles? rubbish' is the wordplay.
'foreign articles?' becomes 'under'.
'rubbish' becomes 'pants' (informal term meaning poor-quality).
'under'+'pants'='UNDERPANTS'
(Other definitions for underpants that I've seen before include "cover and support" , "Shorts" , "Close-fitting garment" , "Intimate clothing" , "drawers" .)