Crossword Genius

Rabies checked by mounting embassy legislation (5)

Ross

I believe the answer is:

lyssa

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

'rabies' is the definition.
(I've seen this in another clue)

'checked by mounting embassy legislation' is the wordplay.
'LYSSA' is hidden back-to-front in amongst the letters.
But, I'm uncertain how the hidden word is indicated.

Can you help me to learn more?

(Another definition for lyssa that I've seen is " rabies".)

I've seen this clue in The Times.
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