Crossword Genius

Big cats nap here, discovering an opportunity to stop and relax (9,5)

Ross

I believe the answer is:

breathing space

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

'big cats nap here discovering an opportunity to stop and relax' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'big cats nap here discovering an opportunity to stop and relax' is the wordplay.
'big cats nap here' anagrams to 'BREATHING SPACE'.
However, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for breathing space that I've seen before include "Brief respite" , "chance to relax" , "room" , "relief" , "might give one an opportunity to relax" .)

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