Father's step across the Channel (3)

I believe the answer is:

pas

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'father's step' is the definition.
'pas' can be an answer for 'step' (I've seen this before). I am not sure about the 'father's' bit.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for pas that I've seen before include "Dance movement" , "step on stage" , "A bit of ballet" , "Ballet duet" , "Dad's" .)

I've seen this clue in the Evening Standard.

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