Consumption in America and Spain (3)
I believe the answer is:
use
'consumption' is the definition.
('use' can be a synonym of 'consumption')
'america and spain' is the wordplay.
'america' becomes 'us' (abbreviation for the United States**).
'and' means one lot of letters go next to another.
'spain' becomes 'e' (abbreviation for Espana).
'us'+'e'='USE'
'in' is the link.
(Other definitions for use that I've seen before include "Employ; consume" , "Manipulate" , "Function, purpose" , "Employ, put into service" , "Practise" .)