Certain to engage in indulgence over varied valuable items (8-5)
I believe the answer is:
treasure-trove
'certain to engage in indulgence over varied valuable items' is the definition.
I can't tell whether this definition defines the answer.
'certain to engage in indulgence over varied' is the wordplay.
'certain' becomes 'sure' (synonyms).
'to engage in' indicates putting letters inside.
'indulgence' becomes 'treat' (to indulge yourself is to treat yourself).
'varied' indicates an anagram.
'sure' going inside 'treat' is 'treasuret'.
'over' is an anagram of 'rove'.
'treasuret'+'rove'='TREASURE-TROVE'
Can you help me to learn more?
(Other definitions for treasure-trove that I've seen before include "Collection of delightful things" , "Hidden store of valuables" , "lots of good things" , "Valuables found hidden" .)