It may hold up a sculptor’s work (6)
I believe the answer is:
plinth
This clue might be a double definition.
'it may hold up' is the first definition.
The definition suggests a singular noun which matches the answer.
'a sculptor's work' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
Can you help me to learn more?
(Other definitions for plinth that I've seen before include "Base for, eg, statue" , "Square block under a column" , "Statue's base" , "Block forming base of column or statue" , "Block or slab forming base of column" .)