An ideal group of rhymes (5,4)

I believe the answer is:

dream team

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

'an ideal group' is the definition.
(the ideal group for a task)

I can't explain the remainder of the clue.

(Other definitions for dream team that I've seen before include "Ideal combination" , "An ideal mix of people" , "Perfect combination of people for a task" , "Group considered as perfect for a given task" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app