Naked models cavorting in the dunes (5)
I believe the answer is:
nudes
'naked models' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Perhaps there's an association between them I don't understand?
'cavorting in the dunes' is the wordplay.
'dunes' anagrams to 'NUDES'.
Though, I'm not clear how this is indicated.
Can you help me to learn more?
(Other definitions for nudes that I've seen before include "Unclothed people" , "Naked figures in paintings" , "Dunes (anag.)" , "Revealing paintings?" , "page-three features?" .)