Crossword Genius

Mum forming part of twosome getting spliced at sea? (4,5)

Ross

I believe the answer is:

main brace

'getting spliced at sea?' is the definition.
(as in the nautical phrase 'splice the mainbrace')

'mum forming part of twosome' is the wordplay.
'mum' becomes 'ma' (ma can mean mother).
'forming part of' becomes 'in' (eg forming part of a group is being in it).
'twosome' becomes 'brace' (synonyms).
'ma'+'in'+'brace'='MAIN BRACE'

(Another definition for main brace that I've seen is " one that may get spliced".)

I've seen this clue in The Times.
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