Light on a routine caused confusion (3,1,5)

I believe the answer is:

led a dance

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'routine caused confusion' is the definition.
I know nothing about this answer so I can't tell whether this works.

'light on a' is the wordplay.
I cannot quite see how this works, but
'light' could be 'led' (abbreviation for light emitting diode) and 'led' is found within the answer.
'a' could be 'an' and 'an' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

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I've seen this clue in The Daily Express.

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