Having to break step can be a nuisance (4)

I believe the answer is:

pest

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

'nuisance' is the definition.
(I've seen this in another clue)

'having to break step can be a' is the wordplay.
'step' can be anagrammed to 'PEST'.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for pest that I've seen before include "A nuisance - step on it" , "Troublesome man or animal" , "Annoyance" , "Aphis" , "Annoying person" .)

I've seen this clue in the Evening Standard.

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