Strange clue because the ‘it’ isn’t being raised, it’s staying in the same place but reversed. You could say the letter t is being raised but that’s not what the clue is telling you to do.
I agree the clue doesn’t quite work like that, as to raise is not the same as to invert, but ‘t is in the dictionary as a shortened form of it, (as in ‘twas) so maybe the clue works like that, though it’s more suited to the Listener than the Jumbo