Beginning with the ring: the ring I lost (6)
I believe the answer is:
origin
'beginning' is the definition.
(origin is a kind of beginning)
'the ring the ring i lost' is the wordplay.
'the ring' becomes 'o'.
'lost' indicates anagramming the letters.
'ring'+'i'='ringi'
'ringi' anagrammed gives 'rigin'.
'o'+'rigin'='ORIGIN'
'with' is the link.
(Other definitions for origin that I've seen before include "extraction" , "Place where something begins" , "Place or point of beginning (6)" , "spring" , "Source, beginning point" .)