Reasonable to find US soldier in pub (7)
I believe the answer is:
logical
'reasonable' is the definition.
('logical' can be similar in meaning to 'reasonable')
'us soldier in pub' is the wordplay.
'us soldier' becomes 'gi' (I've seen this in other clues).
'in' means one lot of letters goes inside another.
'pub' becomes 'local' (I've seen this before).
'gi' inserted inside 'local' is 'LOGICAL'.
'to find' acts as a link.
(Other definitions for logical that I've seen before include "'Rational, coherent (7)'" , "Clearly and soundly reasoned" , "Using reason" , "Consistent with reason" , "entirely reasonable" .)