One who has depressing experience when daughter leaves (5)
I believe the answer is:
owner
'one who has' is the definition.
(a person who has things)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for owner that I've seen before include "One that secured" , "Man of property" , "The one in lawful possession" , "landlord" , "One who possesses" .)