Having to break step can be a nuisance (4)

I believe the answer is:

pest

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'nuisance' is the definition.
(I've seen this in other clues)

'having to break step can be a' is the wordplay.
'step' anagrams to 'PEST'.
However, I am not clear 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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