Crossword Genius

Problem with a reggae-style drumbeat (3-1-3)

Ross

I believe the answer is:

rub-a-dub

'drumbeat' is the definition.
(rub-a-dub means a drumming sound)

'problem with a reggae-style' is the wordplay.
'problem' becomes 'rub' (the rub can mean a problem or catch).
'with' means one lot of letters go next to another.
'reggae-style' becomes 'dub' (style of music associated with reggae).
'rub'+'a'+'dub'='RUB-A-DUB'

I've seen this clue in The Guardian.
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