Priceless stonework found in lodges (11)
I believe the answer is:
freemasonry
'priceless stonework found in lodges' is the definition.
I can't judge whether this definition defines the answer.
'priceless stonework' is the wordplay.
'priceless' becomes 'free' (I can't justify this - if you can you should believe this answer much more).
'stonework' becomes 'masonry' (I've seen this before).
'free'+'masonry'='FREEMASONRY'
Can you help me to learn more?
(Other definitions for freemasonry that I've seen before include "International (lodge) fraternity" , "Tacit understanding" .)