Lays up holy man with his remains? (7)
I believe the answer is:
stashes
'lays up holy man' is the definition.
I can't judge whether this defines the answer.
'with his remains?' is the wordplay.
'with' is a charade indicator (letters next to each other).
'his' becomes 'st' (I am not sure about this - if you are sure you should believe this answer much more).
'remains?' becomes 'ashes' (I've seen this before).
'st' next to 'ashes' is 'STASHES'.
Can you help me to learn more?
(Other definitions for stashes that I've seen before include "Hidden supplies or stores" , "Secret stores" .)