Brutus mislays the bus routine (3)

I believe the answer is:

rut

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'routine' is the definition.
(being stuck in a rut is being stuck in a routine)

'brutus mislays the bus' is the wordplay.
'RUT' is hidden in amongst the letters.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for rut that I've seen before include "It can be frustrating" , "Dull routine behaviour" , "Deep track worn into path" , "A deep track - get out of it" , "Does get attention during this" .)

I've seen this clue in The Globe and Mail.

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