Beats again and drives back (8)

I believe the answer is:

repulses

I believe this is a double definition.

'beats again' is the first definition.
('pulses' is an answer for 'beats' so perhaps 'repulses' is OK for 'beats again')

'drives back' is the second definition.
('repulse' can be a synonym of 'drive back')

'and' is the link.

(Another definition for repulses that I've seen is " Rebuffs, repels".)

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

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