Moral standards displayed by Soviet hospitality (5)
I believe the answer is:
ethos
'moral standards' is the definition.
(I've seen this in another clue)
'displayed by soviet hospitality' is the wordplay.
'displayed by' indicates a hidden word.
'ETHOS' is hidden within 'soviet hospitality'.
(Other definitions for ethos that I've seen before include "Spirit of a culture/age" , "Distinctive spirit of an institution" , "The distinctive spirit of a culture or an era" , "Distinctive attitude (of culture, person etc)" , "Distinctive principles of an era, group, etc" .)