Revised rate then put at risk (8)
I believe the answer is:
threaten
'put at risk' is the definition.
(I've seen this before)
'revised rate then' is the wordplay.
'revised' is an anagram indicator.
'rate'+'then'='ratethen'
'ratethen' anagrammed gives 'THREATEN'.
(Other definitions for threaten that I've seen before include "Bully" , "Menace - impend" , "Menace, warn of intention to harm" , "Utter intentions of injury or punishment" , "Impend, portend" .)