"Family on the outskirts of Rio" is very clear (7)
I believe the answer is:
clarion
'very clear' is the definition.
'clarion' can be an answer for 'clear' (thesaurus). I'm unsure of the 'very' bit.
'family on the outskirts of rio' is the wordplay.
'family' becomes 'clan' (I've seen this in another clue).
'on the outskirts of' indicates putting letters inside.
'clan' enclosing 'rio' is 'CLARION'.
'is' is the link.
Can you help me to learn more?
(Other definitions for clarion that I've seen before include "Clear and ringing" , "Medieval brass instrument heard in carol" , "A loud rousing sound" , "Loud, clear (call); old trumpet" , "Loud and clear; shrill war trumpet" .)