One with minor responsibilities (8)
I believe the answer is:
guardian
'with minor responsibilities' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'one' is the wordplay.
I cannot really see how this works, but
'one' could be 'an' (I've seen this in other clues) and 'an' is found within the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for guardian that I've seen before include "One in loco parentis" , "Type of angel" , "Defender, protector" , "Curator" , "Protector or watchful angel" .)