Information found by girl in Swiss city (6)
I believe the answer is:
geneva
'swiss city' is the definition.
(I've seen this before)
'information found by girl' is the wordplay.
'information' becomes 'gen' (gen can informally mean information).
'found by' says to put letters next to each other.
'girl' becomes 'Eva' (girl's name).
'gen'+'eva'='GENEVA'
'in' is the link.
(Other definitions for geneva that I've seen before include "Convention site" , "European city" , "Swiss city (Convention)" , "Swiss city - Dutch spirit" , "International agreement on the treatment of civilians and captured or wounded military personnel in wartime" .)