Organised group of singers return to Brazilian city after visiting Switzerland (5)
I believe the answer is:
choir
'organised group of singers' is the definition.
(I've seen this before)
'return to brazilian city after visiting switzerland' is the wordplay.
'return' says the letters should be written backwards.
'to brazilian city' becomes 'Rio' (Rio de Janeiro).
'after' says to put letters next to each other.
'visiting switzerland' becomes 'ch' (short for Confoederatio Helvetica, its Latin name. I am not sure about the 'visiting' bit.).
'rio' back-to-front is 'oir'.
'oir' put after 'ch' is 'CHOIR'.
Can you help me to learn more?
(Other definitions for choir that I've seen before include "Singing group" , "Group of singers, often in church" , "Religious singers" , "Singers in harmony" , "Vocalists in group" .)