Englishman in Mexico going nuts about Republican (6)
I believe the answer is:
gringo
'englishman in mexico' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'going nuts about republican' is the wordplay.
'nuts' indicates anagramming the letters (nuts can mean crazy).
'about' indicates putting letters inside.
'republican' becomes 'r' (abbreviation).
'going' anagrammed gives 'gingo'.
'gingo' placed around 'r' is 'GRINGO'.
Can you help me to learn more?
(Other definitions for gringo that I've seen before include "Non-Spanish speaker" , "What the Mexican calls the American" , "Latin-American term for English speaker" , "English-speaker abroad" .)