Ring from Lima leaving greeting (4)
I believe the answer is:
halo
'ring' is the definition.
('halo' can be a synonym of 'ring')
'lima leaving greeting' is the wordplay.
'lima' becomes 'l' (phonetic alphabet: alpha, bravo, charlie etc.).
'leaving' suggests deleting specific letters.
'greeting' becomes 'hallo' (I've seen this before).
'hallo' with 'l' taken away is 'HALO'.
'from' is the link.
(Other definitions for halo that I've seen before include "Aureole" , "Circle over saint's head in painting" , "Aura round admired person" , "Crown" , "overhead lighting?" .)