Crossword Genius

Cat beetled off before one's very eyes (10)

Ross

I believe the answer is:

detectable

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'before one's very eyes' is the definition.
I can't judge whether this definition defines the answer.

'cat beetled off' is the wordplay.
'off' is an anagram indicator.
'cat'+'beetled'='catbeetled'
'catbeetled' with letters rearranged gives 'DETECTABLE'.

Can you help me to learn more?

(Another definition for detectable that I've seen is " apparent?".)

I've seen this clue in The Guardian.
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