Foreign nobleman enraged by exchange of letters (7)
I believe the answer is:
grandee
'foreign nobleman' is the definition.
'grandee' can be an answer for 'nobleman' (grandee is a kind of nobleman). I am not certain of the 'foreign' bit.
'enraged by exchange of letters' is the wordplay.
'enraged' can be anagrammed to 'GRANDEE'.
Though, I'm not sure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for grandee that I've seen before include "Eminent man" , "European lord" , "VIP" , "aristocrat" , "man of high rank abroad" .)