Crossword Genius

A rude Wren flashed knickers? (9)

Ross

I believe the answer is:

underwear

'knickers?' is the definition.
(I've seen this before)

'a rude wren flashed' is the wordplay.
'flashed' indicates anagramming the letters (I've seen 'flash' mean this).
'a'+'rude'+'wren'='arudewren'
'arudewren' anagrammed gives 'UNDERWEAR'.

(Other definitions for underwear that I've seen before include "Garments worn next to the skin" , "Possibly slips" , "Drawers" , "Bloomers" , "Smalls,shorts,lingerie etc" .)

I've seen this clue in The Independent.
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