Stuck heads on gold leaf under emerald and diamond (5)
I believe the answer is:
glued
'stuck' is the definition.
(I've seen this in another clue)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for glued that I've seen before include "Stuck together" , "Gummed" , "Stuck one thing to another" .)