I'd 1st check for a worn wheel bearing
jack the car up so the wheel is off the ground and shake the tyre from top to bottom and from side to side there should be no play in either direction. Any play in 1 direction will usually require a joint to be replaced, if there’s play in both directions then the wheel bearing may be at fault
if this is OK then it could be a worn drive shaft joint - typically these won't produce any vibration unless badly damaged but they can be noisy or 'clonk' for a long time beforehand, take a look at the drive-shaft rubber boot there should be no rips or tears in it and the suspension should be clean and dry of any grease.
also check the rear brake disc and pads for signs of binding up
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