Is put out of business by moral principles (6)
I believe the answer is:
ideals
'principles' is the definition.
(I've seen this before)
'is put out of business by moral' is the wordplay.
I cannot quite understand how this works, but
'business' could be 'deal' and 'deal' is found within the answer.
'is' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for ideals that I've seen before include "Models of behaviour to aim for" , "Lofty aims for ladies" , "Standards to be aimed at" , "Moral standards" , "Highest standards, model objectives" .)