Crossword Genius

Forbid to make the bed a bit warm? (5)

Ross

I believe the answer is:

debar

I'm a little stuck... Click here to teach me more about this clue!

'forbid' is the definition.
(I know that debar is a kind of forbid)

'the bed a bit warm?' is the wordplay.
I cannot really see how this works, but
an anagram of 'bed' is 'deb' which is present in the answer.
'a' is present in the answer.
A single letter 'r' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

'to make' acts as a link.

Can you help me to learn more?

(Other definitions for debar that I've seen before include "Exclude (from right)" , "Prohibit (from doing something)" , "Large advert" , "Rule out" , "Keep out" .)

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