Ship has gone ahead getting winter conveyances (5)

I believe the answer is:

sleds

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'conveyances' is the definition.
(sled is a kind of conveyance)

'ship has gone' is the wordplay.
'ship' becomes 'SS' (prefix in ship names eg SS Great Britain).
'has' is an insertion indicator.
'gone' becomes 'led' ('lead' can be a synonym of 'go').
'ss' enclosing 'led' is 'SLEDS'.

'ahead getting winter' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

I've seen this clue in The Mirror.

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