Report on soldiers in Welsh city (6)
I believe the answer is:
bangor
'welsh city' is the definition.
(I've seen this before)
'report on soldiers' is the wordplay.
'report' becomes 'bang' (I've seen this before).
'on' means one lot of letters go next to another.
'soldiers' becomes 'or' (Other Rank).
'bang'+'or'='BANGOR'
'in' is the link.
(Other definitions for bangor that I've seen before include "University city on the Menai Strait" , "Place in Wales, Northern Ireland or New England" , "Welsh city" , "Welsh resort" , "Welsh university" .)