Disheartened suitor ends life, abandoned and alone (10)
I believe the answer is:
friendless
'alone' is the definition.
(I've seen this before)
'disheartened suitor ends life abandoned' is the wordplay.
'disheartened' says to hollow out the word (remove centre letters).
'abandoned' is an anagram indicator.
'suitor' with its centre taken out is 'sr'.
'sr'+'ends'+'life'='srendslife'
'srendslife' is an anagram of 'FRIENDLESS'.
'and' acts as a link.
(Other definitions for friendless that I've seen before include "Socially isolated" , "Socially alone" , "Lacking pals" , "solitary" , "lonely" .)