Stone put in place for A-listers? (3,3)
I believe the answer is:
jet set
'a-listers?' is the definition.
(both can mean rich or important people)
'stone put in place' is the wordplay.
'stone' becomes 'jet' (type of stone).
'put in place' becomes 'set' (set can mean to position something).
'jet'+'set'='JET SET'
'for' acts as a link.
(Other definitions for jet set that I've seen before include "International crowd" , "Group of rich and fashionable folk" , "Wealthy elite" , "Fast-living group" , "Rich and smart international travellers" .)