Place of rapid growth - with an electric blanket? (6)

I believe the answer is:

hotbed

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'place' is the definition.
(I have seen 'vicious place' mean 'hotbed' so perhaps 'place' could also mean 'hotbed')

I don't understand how the remainder of the clue works.

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(Other definitions for hotbed that I've seen before include "Place with ideal conditions for rapid growth" , "Scene of rapid growth, as of intrigue" , "vicious place" , "Forced to grow up early in this" , "Place with ideal conditions for development" .)

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