Crossword Genius

Klutzy, jagged slit ran above concealed safe (15)

Ross

I believe the answer is:

uncontroversial

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

'klutzy jagged slit' is the definition.
Both the answer and definition are adjectives. Perhaps you can see a link between them that I don't see?

'ran above concealed safe' is the wordplay.
I cannot quite understand how this works, but
'above' could be 'over' (I've seen this before) and 'over' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

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