Crossword Genius

Ben perhaps entering bus lane, busy beyond words (11)


I believe the answer is:


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'ben perhaps entering bus lane busy beyond' is the definition.
I can't tell whether this defines the answer.

'words' is the wordplay.
I cannot really see how this works, but
'words' could be 'speak' (I have seen 'Utter words' mean 'speak' so perhaps 'words' could also mean 'speak') and 'speak' is found within the answer.
The remaining letters 'unable' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for unspeakable that I've seen before include "The hardest tongue twisters are" , "awful?" , "Too bad for words" , "Was Marcel Marceau's act so" , "Is impossible pronunciation so" .)

I've seen this clue in The Times.
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