Repeatedly anger bishop about a problem overseas
I believe the answer is:
beriberi
'a problem overseas' is the definition.
I can't judge whether this definition defines the answer.
'repeatedly anger bishop about' is the wordplay.
'repeatedly' says to double the letters.
'anger' becomes 'ire' ('ire' can be a synonym of 'anger').
'bishop' becomes 'b' (abbreviation used in chess).
'about' says the letters should be written in reverse.
'ire'+'b'='ireb'
'ireb' reversed gives 'beri'.
'beri' duplicated is 'BERIBERI'.
Can you help me to learn more?
(Other definitions for beriberi that I've seen before include "Disease (lack of vit. B1)" , "Disease caused by lack of vitamin B" , "possible cause of heart failure" , "Tropical disease caused by lack of vitamin B1" , "illness" .)