A sad feeling coming off the summit with title-holder (5)
I believe the answer is:
owner
'title-holder' is the definition.
(I've seen this before)
'a sad feeling coming off the summit with' is the wordplay.
I cannot quite see how this works, but
'with' could be 'w' (abbreviation) and 'w' is present in the answer.
'a' could be 'one' and 'one' is located in the leftover letters.
A single letter 'r' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for owner that I've seen before include "Keeper" , "Legal possessor" , "Possessor, proprietor" , "Holder, possessor" , "Title holder?" .)