Hope spread about new planet being a furnace (4,6)

I believe the answer is:

open hearth

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'hope spread about new planet being a furnace' is the definition.
I can't judge whether this definition defines the answer.

'hope spread about new planet' is the wordplay.
'spread' indicates anagramming the letters.
'about' means one lot of letters goes inside another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'planet' becomes 'earth' (Earth is an example).
'hope' with letters rearranged gives 'opeh'.
'opeh' enclosing 'n' is 'openh'.
'openh'+'earth'='OPEN-HEARTH'

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(Another definition for open hearth that I've seen is " sort of furnace".)

I've seen this clue in The Daily Express.

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