Somewhere in Mexico, a Catholic by cupola, trembling (8)
I believe the answer is:
acapulco
'somewhere in mexico' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'a catholic by cupola trembling' is the wordplay.
'catholic' becomes 'C' (abbreviation as in RC for Roman Catholic).
'by' says to put letters next to each other.
'trembling' indicates anagramming the letters.
'cupola' anagrammed gives 'apulco'.
'a'+'c'+'apulco'='ACAPULCO'
Can you help me to learn more?
(Other definitions for acapulco that I've seen before include "exotic holiday resort" , "Mexico port, resort" , "Mexican Pacific seaside resort" , "Fashionable port city of southern Mexico" , "foreign resort" .)