Cruise vessel (4)
'cruise vessel' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for liner that I've seen before include "Large passenger vessel" , "Large passenger or cargo ship travelling on regular route" , "reinforcement" , "Large ship or removable layer of material" , "Big ship" .)
'cruise vessel' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ship that I've seen before include "eg QE2" , "Large craft" , "Convey (goods); a vessel" , "Large boat, dispatch" , "In a word, final indication of rank or position" .)