Hyde's other half! (6)

I believe the answer is:

jekyll

(Other definitions for jekyll that I've seen before include "Doctor with an alter ego" , "Potato heap; immobilise (car)" , "Robert Louis Stevenson novel 'Dr . . . . . . and Mr Hyde'" , "The Strange Case of Dr . . . . . . and Mr Hyde" , "Gertrude, gardener" .)

I've seen this clue in The Sun.

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