Information supplied by American group (5)
I believe the answer is:
genus
'american group' is the definition.
'genus' can be an answer for 'group' (genus is a kind of group). I'm not certain of the 'american' bit.
'information supplied' is the wordplay.
'information' becomes 'gen' (gen is a kind of information).
'supplied' becomes 'us' (I am not sure about this - if you are sure you should believe this answer much more).
'gen'+'us'='GENUS'
'by' is the link.
Can you help me to learn more?
(Other definitions for genus that I've seen before include "The Homo of Homo sapiens?" , "Category above species (Biology)" , "Division of family" , "Part of the family" , "Biological group containing one or more species" .)