Crossword Genius

Two types of neckwear for keen rower (6)

Ross

I believe the answer is:

boatie

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'two types' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'neckwear for keen rower' is the wordplay.
'neckwear' becomes 'boa' (boa can mean a scarf).
'for' means one lot of letters go next to another.
'keen rower' becomes 'tie' (I can't justify this - if you can you should give a lot more credence to this answer).
'boa'+'tie'='BOATIE'

'of' acts as a link.

Can you help me to learn more?

(Another definition for boatie that I've seen is " Someone on board".)

I've seen this clue in The Times.
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