Wager Ireland should brook no abomination (4,5)
I believe the answer is:
bete noire
'abomination' is the definition.
(thesaurus)
'wager ireland should brook no' is the wordplay.
I cannot really see how this works, but
'wager' could be 'bet' (synonyms) and 'bet' is found in the answer.
'ireland' could be 'ir' (I've seen this in other clues) and 'ir' is found within the answer.
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is found within the answer.
The remaining letters 'ene' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for bete noire that I've seen before include "Particular object of loathing" , "Person or thing one particularly dislikes" , "Pet hate" , "One's particular hate" , "Intensely disliked thing" .)