Land in water after a passage (5)
I believe the answer is:
aisle
'passage' is the definition.
(aisle is a kind of passage)
'land in water after a' is the wordplay.
'land in water' becomes 'isle' (I've seen this before).
'after' says to put letters next to each other.
'isle' put after 'a' is 'AISLE'.
(Other definitions for aisle that I've seen before include "'Passage, gangway (5)'" , "Passageway in theatre" , "Corridor" , "lateral strip" , "Here comes the bride" .)