For every country, large study (7)
I believe the answer is:
perusal
'study' is the definition.
(I've seen this before)
'for every country large' is the wordplay.
'for every' becomes 'per' ('per' means 'for each' or 'for every').
'country' becomes 'usa' (U.S.A. is an example).
'large' becomes 'L' (eg in clothes sizes).
'per'+'usa'+'l'='PERUSAL'
(Other definitions for perusal that I've seen before include "thorough scan" , "Careful look" , "Process of examination" , "Scanning, reading" , "Examination, survey" .)