Crossword Genius

"twin propellers" (4)

Ross

I think it could be either:

Which length description are you looking for?:

4

4,2,4

pair of oars

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'twin propellers' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'twin propellers' is the wordplay.
I cannot really see how this works, but
'twin' could be 'pair' (synonyms) and 'pair' is present in the answer.
'propellers' could be 'oars' (I've seen this in another clue) and 'oars' is present in the answer.
The remaining letters 'of' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Globe and Mail.
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