Canada youngsters try gin cocktails perhaps (8)
I believe the answer is:
goslings
'canada youngsters' is the definition.
(young geese - Canada goose is a type of goose)
'try gin cocktails perhaps' is the wordplay.
'try' becomes 'go' (both can mean an attempt).
'gin cocktails perhaps' becomes 'slings' (a sling cocktail might be made with gin).
'go'+'slings'='GOSLINGS'
(Other definitions for goslings that I've seen before include "Chicks - signs log (anag)" , "birds" , "Glossing over little geese" , "Young geese" , "Greenhorns" .)