Relish having one liberator (7)
I believe the answer is:
saviour
'liberator' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'relish having one' is the wordplay.
I cannot quite see how this works, but
'one' could be 'i' (Roman numeral) and 'i' is found within the answer.
'relish' could be 'savour' (synonyms) and 'savour' is found in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for saviour that I've seen before include "Deliverer or redeemer" , "Rescuer" , "people worship Him" , "One who delivers people from harm or danger" , "Mankind's deliverer (The Scaffold's Lily 15)" .)