Former president of America consumed by misguided anger (6)
I believe the answer is:
reagan
'former president' is the definition.
(I've seen this before)
'america consumed by misguided anger' is the wordplay.
'america' becomes 'a' (common abbreviation - e.g. in organisation names).
'consumed by' is an insertion indicator.
'misguided' indicates anagramming the letters (I've seen this in other clues).
'anger' with letters rearranged gives 'reagn'.
'a' placed within 'reagn' is 'REAGAN'.
'of' acts as a link.
(Other definitions for reagan that I've seen before include "A range for the US President" , "Former leader" , "Ronald ..., ex-president of USA" , "US president nineteen eighty one to ninteen eighty nine" , "40th US president, Ronald" .)