Crossword Genius

Float worker managed to pick up a paper, Sun and Mail, initially (8)

Ross

I believe the answer is:

raftsman

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

'managed to pick up a paper sun and mail initially' is the definition.
I can't tell whether this definition defines the answer.

'float worker' is the wordplay.
'float' becomes 'rafts' (I can't explain this - if you can you should believe this answer much more).
'worker' becomes 'man' (man is a kind of worker).
'rafts'+'man'='RAFTSMAN'

Can you help me to learn more?

(Another definition for raftsman that I've seen is " someone plying their craft".)

I've seen this clue in The Guardian.
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