Reasonable pub entered by a soldier (7)
I believe the answer is:
logical
'reasonable' is the definition.
(similar in meaning)
'pub entered by a soldier' is the wordplay.
'pub' becomes 'local' (one's local pub).
'entered by' indicates putting letters inside (I've seen this in other clues).
'a soldier' becomes 'GI' (GI can mean a US soldier).
'local' going around 'gi' is 'LOGICAL'.
(Other definitions for logical that I've seen before include "entirely reasonable" , "clear" , "Correctly thought out" , "Sound" , "Consistent with reason" .)