Central heating off, apparently (5)

I believe the answer is:

chill

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'central heating off apparently' is the definition.
I can't judge whether this definition defines the answer.

'central heating off' is the wordplay.
'central heating' becomes 'ch'.
'off' becomes 'ill' ().
'ch'+'ill'='CHILL'

Can you help me to learn more?

(Other definitions for chill that I've seen before include "Slight cold" , "Make cold; relax" , "Slang injunction to relax - it's cold" , "Iciness" , "Make cold (or frightened)" .)

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

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