Diversion - reversed on Hooky Street (7,8)
I believe the answer is:
outside interest
'diversion reversed on hooky' is the definition.
I can't tell whether this definition defines the answer.
'street' is the wordplay.
I cannot really see how this works, but
an anagram of 'street' is 'terest' which is within the answer.
The remaining letters 'outsidein' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for outside interest that I've seen is " hobby".)