Crossword Genius

Such boys show the way to take a bend in top! (3-2)

Ross

I believe the answer is:

ton-up

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'such boys show' is the definition.
The definition suggests a singular noun which matches the answer.

'way to take a bend in top' is the wordplay.
'way' becomes 'n' (Compass direction - North).
'to take' is a charade indicator (letters next to each other).
'a bend' becomes 'U' (a U-bend is a kind of bend - pipe under sink).
'in' is an insertion indicator.
'n'+'u'='nu'
'nu' put inside 'top' is 'TON-UP'.

'the' acts as a link.

Can you help me to learn more?

(Other definitions for ton-up that I've seen before include "Fond of travelling at high speed" , "Travelling at one hundred mph" , "fast!" , "Going at 100 mph" , "going quickly" .)

I've seen this clue in the Evening Standard.
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