European stood around in dress (6)
I believe the answer is:
enrobe
'dress' is the definition.
(I know that enrobe is a more specific form of the action attire)
'european stood around' is the wordplay.
I cannot quite understand how this works, but
'european' could be 'e' (abbreviation e.g. EU) and 'e' is found within the answer.
'around' could be 'o' (a round letter) and 'o' is found in the answer.
This explanation may well be incorrect...
'in' is the link.
Can you help me to learn more?
(Other definitions for enrobe that I've seen before include "Dress, clothe, invest" , "Clad ceremonially" , "put on formally ..." , "Don a vestment" , "make investment?" .)