Cruise line has break-even and disobedient box opener (7)
I believe the answer is:
pandora
'box opener' is the definition.
(I've seen this in another clue)
'cruise line has break-even' is the wordplay.
'cruise line' becomes 'pando' (I can't justify this - if you can you should give a lot more credence to this answer).
'has' is a charade indicator (letters next to each other).
'even' indicates alternate letters (even-numbered letters are used).
The alternating letters of 'break' are 'ra'.
'pando'+'ra'='PANDORA'
'and disobedient' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for pandora that I've seen before include "Mythical box opener" , "Girl with box of troubles" , "whose opening was a disaster?" , "First mortal woman of Greek mythology" , "Possessor of famous box" .)