Record US soldier by area in arcade (6)
I believe the answer is:
loggia
'arcade' is the definition.
(loggia is a kind of arcade)
'record us soldier by area' is the wordplay.
'record' becomes 'log' (logging is a kind of recording).
'us soldier' becomes 'gi' (I've seen this in other clues).
'by' means one lot of letters go next to another.
'area' becomes 'a' (maths abbreviation).
'log'+'gi'+'a'='LOGGIA'
'in' acts as a link.
(Other definitions for loggia that I've seen before include "A covered but open arcade" , "Open-sided gallery or arcade" , "Covered area beside building" , "Roofed arcade or gallery" , "Covered arcaded gallery" .)