Margaret carrying one black French item for the boudoir (8)
I believe the answer is:
peignoir
'item for the boudoir' is the definition.
I can't judge whether this defines the answer.
'margaret carrying one black french' is the wordplay.
'margaret' becomes 'Peg' (nickname for someone called Margaret).
'carrying' is an insertion indicator.
'one' becomes 'i' (Roman numeral).
'black french' becomes 'noir' ('black' in French).
'peg' going around 'i' is 'peig'.
'peig'+'noir'='PEIGNOIR'
Can you help me to learn more?
(Other definitions for peignoir that I've seen before include "Woman's light dressing-gown" , "Woman's light dressing gown" , "Woman's loose full dressing gown" , "bathrobe" , "habit" .)