Trumpet family’s taken around carnival city (7)
I believe the answer is:
clarion
'trumpet' is the definition.
(I've seen this before)
'family's taken around carnival city' is the wordplay.
'family' becomes 'clan' (clan can mean a large family).
'taken around' is an insertion indicator.
'carnival city' becomes 'Rio' (Rio de Janeiro is famous for its carnival).
'clan' placed around 'rio' is 'CLARION'.
(Other definitions for clarion that I've seen before include "Loud, clear (call); old trumpet" , "In church maybe stop" , "Loud, clear and rousing" , "Musical instrument" , "It makes a shrill note" .)