Crossword Genius

First man’s top half goes into his better half’s skirt (5)

Ross

I believe the answer is:

evade

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'skirt' is the definition.
(synonyms)

I cannot understand how the remainder of the clue works.

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(Other definitions for evade that I've seen before include "Keep away from" , "Shun, escape" , "Escape (esp. by guile)" , "Shirk" , "Illegally escape (taxes)" .)

I've seen this clue in The Hindu.
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