Organised groups making inordinate din with ecstasy (10)
I believe the answer is:
syndicates
'organised groups making inordinate' is the definition.
I can't tell whether this definition defines the answer.
'din with ecstasy' is the wordplay.
I cannot quite see how this works, but
an anagram of 'din' is 'ndi' which is within the answer.
an anagram of 'ecstasy' is 'sycates' which is present in the left over letters.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for syndicates that I've seen is " Associations".)