Cherish bust found in valuable box (8,5)
I believe the answer is:
treasure chest
'valuable box' is the definition.
'treasure chest' can be an answer for 'box' (treasure chest is a kind of box). I am not sure about the 'valuable' bit.
'cherish bust' is the wordplay.
'cherish' becomes 'treasure' (synonyms).
'bust' becomes 'chest' (I've seen this before).
'treasure'+'chest'='TREASURE-CHEST'
'found in' acts as a link.
Can you help me to learn more?
(Other definitions for treasure chest that I've seen before include "source of wealth" , "Box for valuables" , "Box holding items of great value" , "Box of wealth" , "Valuable container" .)