Ordinary dress awkward person trimmed before returning it (5)

I believe the answer is:

mufti

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'ordinary dress' is the definition.
'mufti' can be an answer for 'dress' (I have seen 'Civilian dress' mean 'mufti' so perhaps 'dress' could also mean 'mufti'). I am not certain of the 'ordinary' bit.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for mufti that I've seen before include "For soldiers, civilian dress" , "Civilian clothing; Muslim legal expert" , "Non-military clothing" , "Civilian dress (for serviceman)" , "No official dress" .)

I've seen this clue in The Independent.

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