Coherent US soldier in pub (7)
I believe the answer is:
logical
'coherent' is the definition.
(I know that coherent can be written as logical)
'us soldier in pub' is the wordplay.
'us soldier' becomes 'GI' (informal term for a US soldier).
'in' is an insertion indicator.
'pub' becomes 'local' (one's local pub).
'gi' placed into 'local' is 'LOGICAL'.
(Other definitions for logical that I've seen before include "Objective" , "entirely reasonable" , "Correctly reasoned, makes sense" , "Consistent with reason" , "Following correct reasoning" .)