Crossword Genius

Catchy phrase to play in the middle of a scrum (4)

Ross

I believe the answer is:

hook

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'catchy phrase' is the definition.
(catchy phrase in a song)

'play in the middle of a scrum' is the wordplay.
'play' becomes 'chop' (chop is a kind of play).
'in the middle of' indicates the central letters (I've seen 'in the middle' mean this).
'a scrum' becomes 'ok' (I am not sure about this - if you are sure you should believe this answer much more).
The middle letters of 'chop' are 'ho'.
'ho'+'ok'='HOOK'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for hook that I've seen before include "leader of pirates" , "Punch; fish catcher" , "Claw" , "Prostitute" , "Ensnare" .)

I've seen this clue in the Sydney Morning Herald.
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