Hoarder’s never-ending distress (5)
I believe the answer is:
miser
'hoarder's' is the definition.
(I have seen 'Hoarder of money' mean 'miser' so perhaps 'hoarder' could also mean 'miser')
'never-ending distress' is the wordplay.
'never ending' means to remove the last letter.
'distress' becomes 'misery' (I've seen this before).
'misery' with its last letter taken away is 'MISER'.
(Other definitions for miser that I've seen before include "Curmudgeon" , "hunks" , "One doesn't spend much" , "One hoarding money" , "auger" .)