Refuting the idea and point by mother from Channel Islands consumed by allowance (12)
I believe the answer is:
renunciation
'refuting the idea and point by mother' is the definition.
I can't tell whether this definition defines the answer.
'channel islands consumed by allowance' is the wordplay.
'channel' becomes 'enun' (I can't justify this - if you can you should give a lot more credence to this answer).
'islands' becomes 'ci' (Channel Islands).
'consumed by' indicates putting letters inside (inserted letters get consumed).
'allowance' becomes 'ration' (I've seen this before).
'enun'+'ci'='enunci'
'enunci' inserted inside 'ration' is 'RENUNCIATION'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for renunciation that I've seen before include "Giving up of rights, claim etc" , "consequence of cloistered life?" , "surrender" , "Action of giving up a thing" .)