Crossword Genius

Cube confused with exponential? Unlikely to be called out (15)

Ross

I believe the answer is:

unexceptionable

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

'unlikely to be called out' is the definition.
I can't judge whether this definition defines the answer.

'cube confused with exponential?' is the wordplay.
'confused with' indicates an anagram.
'cube' mixed up with 'exponential' can make 'UNEXCEPTIONABLE'.

Can you help me to learn more?

(Another definition for unexceptionable that I've seen is " entirely satisfactory".)

I've seen this clue in The Times.
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