Hedonists implore certain singers' group (8,7)

I believe the answer is:

pleasure seekers

I'm a little stuck... Click here to teach me more about this clue!

'hedonists' is the definition.
('pleasure seeker' can be a synonym of 'hedonist')

'implore certain singers' group' is the wordplay.
I cannot really understand how this works, but
'certain' could be 'sure' (similar in meaning) and 'sure' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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