Don brand's clothing? This may be considered rude (5,4)
I believe the answer is:
swear word
'clothing? this may be considered rude' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'don brand's' is the wordplay.
I cannot really understand how this works, but
'don' could be 'wear' (synonyms) and 'wear' is located in the answer.
'brand' could be 'sword' (synonyms) and 'sword' is present in the remaining letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for swear word that I've seen before include "Curse" , "could be bloody?" , "oath" .)