Sculptures of at least three Greek characters (6)
I believe the answer is:
pietas
'sculptures' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe you can see a link between them that I don't see?
'at least three greek characters' is the wordplay.
'at least three' becomes 'pi' (I can't justify this - if you can you should give a lot more credence to this answer).
'greek characters' becomes 'etas' (eta is a Greek letter).
'pi'+'etas'='PIETAS'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for pietas that I've seen before include "Representations of the Virgin Mary mourning over the dead body of Jesus" , "Ta, pies can make sacred statues" .)