The cry of an Indian housed in Southern Switzerland (7)
I believe the answer is:
screech
'the cry' is the definition.
(screech is a kind of cry)
'an indian housed in southern switzerland' is the wordplay.
'an indian' becomes 'cree' (Cree is an example).
'housed in' indicates putting letters inside.
'southern' becomes 's' (abbreviation).
'switzerland' becomes 'ch' (short for Confoederatio Helvetica, its Latin name).
's'+'ch'='sch'
'cree' going inside 'sch' is 'SCREECH'.
'of' is the link.
(Other definitions for screech that I've seen before include "Squeal" , "Terrifying sound" , "cry of horror" , "Yell" , "Cry raucously; type of owl" .)