Paid out for one, being loveless and unhappy (6)
I believe the answer is:
pained
'unhappy' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'paid out for one being loveless' is the wordplay.
'out' means to remove the last letter.
'for' says to put letters next to each other.
'one being loveless' becomes 'ned' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'paid' with its final letter taken away is 'pai'.
'pai'+'ned'='PAINED'
'and' is the link.
Can you help me to learn more?
(Other definitions for pained that I've seen before include "Hurt and disapproving (6)" , "Caused suffering to" , "Distressed and annoyed - hurted" , "Caused hurt." , "Distressed so it hurts?" .)