Spill the beans to admitted loner (9)
I believe the answer is:
singleton
'loner' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'spill the beans to admitted' is the wordplay.
'spill the beans' becomes 'sing' (both can mean to reveal secrets).
'to admitted' becomes 'leton' (I've seen this in another clue).
'sing'+'leton'='SINGLETON'
Can you help me to learn more?
(Other definitions for singleton that I've seen before include "Anything on its own" , "person not in a long-term relationship?" , "spinster or bachelor?" , "Card that is only one held in its suit" , "Eg lonely heart" .)