Crossword Genius

Mops with sailor on board ship (5)

Ross

I believe the answer is:

swabs

'mops' is the definition.
(I know this)

'with sailor on board ship' is the wordplay.
'with' becomes 'w' (short for with).
'sailor' becomes 'ab' (abbreviation for able seaman).
'on board' is an insertion indicator (inserted letters are taken on board).
'ship' becomes 'SS' (prefix in ship names eg SS Great Britain).
'w'+'ab'='wab'
'wab' going within 'ss' is 'SWABS'.

I've seen this clue in The Telegraph.
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