Crossword Genius

Swirling steam is a hazard to ships' navigators (3,4)

Ross

I believe the answer is:

sea mist

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

'a hazard to ships' navigators' is the definition.
I can't judge whether this defines the answer.

'swirling steam is' is the wordplay.
'swirling' is an anagram indicator.
'steam'+'is'='steamis'
'steamis' with letters rearranged gives 'SEA MIST'.

Can you help me to learn more?

(Another definition for sea mist that I've seen is " The 'haar' of eastern England and Scotland coasts, for example".)

I've seen this clue in The Irish News.
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