State I had sent back the ring (5)
I believe the answer is:
idaho
'state' is the definition.
(I know that Idaho is a state)
'i had sent back the ring' is the wordplay.
'sent back' shows that the letters should be reversed in order.
'the ring' becomes 'o' (letter resembling a ring).
'had' backwards is 'dah'.
'i'+'dah'+'o'='IDAHO'
(Other definitions for idaho that I've seen before include "State of NW US" , "Another state" , "somewhere in the US" , "Pertaining to the Bard" , "NW state of USA" .)