Crossword Genius

One husband not in short swimming trunks (5)

Ross

I believe the answer is:

torsi

'trunks' is the definition.
('torso' can be a synonym of 'trunk')

'one husband not in short swimming' is the wordplay.
'one' becomes 'i' (Roman numeral).
'husband' becomes 'h' (abbreviation).
'not in' is a deletion indicator.
'swimming' indicates an anagram (letters swim around into a new order).
'short' with 'h' taken away is 'sort'.
'i'+'sort'='isort'
'isort' anagrammed gives 'TORSI'.

(Another definition for torsi that I've seen is " Rare parts of statues".)

I've seen this clue in The Guardian.
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