Most elegantly portrayed stone monument (5)
I believe the answer is:
stele
'stone monument' is the definition.
'stele' can be an answer for 'stone' (I have seen 'Upright stone ' mean 'stele' so perhaps 'stone' could also mean 'stele'). I'm unsure of the 'monument' bit.
'most elegantly portrayed' is the wordplay.
'STELE' is hidden in amongst the letters.
However, I'm not sure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for stele that I've seen before include "Ancient gravestone" , "Column" , "Standing stone" , "Upright stone slab" , "Commemorative stone" .)