Loveless one receives morning call (4)
I believe the answer is:
name
'call' is the definition.
(as in calling or naming someone something)
'loveless one receives morning' is the wordplay.
'loveless' becomes 'ne' (I am not sure about this - if you are sure you should believe this answer much more).
'one receives' means one lot of letters goes inside another (inserted letters are received).
'morning' becomes 'am'.
'ne' enclosing 'am' is 'NAME'.
Can you help me to learn more?
(Other definitions for name that I've seen before include "By which one is known" , "Moniker" , "Designation; fame" , "Reputation; identify" , "Cite" .)