Owners of smart rabbit warren tidied up burrows regularly (also half a dozen others here) (6,4)
I believe the answer is:
warner bros
'owners of smart rabbit' is the definition.
(studio which created Bugs Bunny)
'warren tidied up burrows regularly also half a dozen others here' is the wordplay.
I cannot really see how this works, but
an anagram of 'warren' is 'warner' which is present in the answer.
The remaining letters 'bros' 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?
(Another definition for warner bros that I've seen is " record label".)