Crossword Genius

Some ships’ officers take extra-large in bread rolls (6)

Ross

I believe the answer is:

bosuns

I'm a little stuck... Click here to teach me more about this clue!

'some ships' officers' is the definition.
The definition and answer can be both people as well as being plural nouns.
Maybe there's a link between them I don't understand?

'extra-large in bread rolls' is the wordplay.
'extra large' becomes 'os' (Over Size - library term for books).
'in' is an insertion indicator.
'bread rolls' becomes 'buns' (I've seen this in another clue).
'os' placed within 'buns' is 'BOSUNS'.

'take' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
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