I see rifle almost raised in WWI campaign (9)
I believe the answer is:
gallipoli
'wwi campaign' is the definition.
(World War One campaign)
'i see rifle almost raised' is the wordplay.
'see' becomes 'lo' ('lo' is an archaic exclamation meaning 'look!').
'rifle' becomes 'pillage' (both can mean to rob a place).
'almost' means to remove the last letter (most of the word but not all of it).
'raised' is a reversal indicator (going up in a down clue).
'pillage' with its final letter taken off is 'pillag'.
'i'+'lo'+'pillag'='ilopillag'
'ilopillag' backwards is 'GALLIPOLI'.
'in' is the link.
(Other definitions for gallipoli that I've seen before include "military campaign" , "old war-zone" , "World War I battle of the Dardanelles" , "military invasion" , "Turkish peninsula - scene of WWI campaign" .)