Coming to no conclusion (7)
I believe the answer is:
endless
'coming to no conclusion' is the definition.
I can't tell whether this defines the answer.
'coming to no conclusion' is the wordplay.
'coming to' is a charade indicator (letters next to each other).
'no' becomes 'less' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'conclusion' becomes 'end' (something's conclusion is its end).
'less' put after 'end' is 'ENDLESS'.
Can you help me to learn more?
(Other definitions for endless that I've seen before include "Havin no limit" , "Unceasing" , "no boundaries" , "'Eternal, perpetual (7)'" , "Occurring so frequently so as to seem uninterrupted" .)