The valuables are bound to follow a different rate (8)
I believe the answer is:
treasure
'the valuables' is the definition.
(I've seen this before)
'bound to follow a different rate' is the wordplay.
'bound to' becomes 'sure' (synonyms).
'follow' means one lot of letters go next to another.
'a different' is an anagram indicator (letters placed in a different order).
'rate' anagrammed gives 'trea'.
'sure' after 'trea' is 'TREASURE'.
'are' is the link.
(Other definitions for treasure that I've seen before include "quantity of wealth" , "Highly valued possession" , "Store of valuables" , "much-loved person" , "Accumulated riches" .)