Crossword Genius

What Santa has, to keep a bit warm in bed? (5)

Ross

I believe the answer is:

beard

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

'what santa' is the definition.
I can't tell whether this definition defines the answer.

'to keep a bit warm in bed?' is the wordplay.
'to keep' indicates putting letters inside.
'a bit warm in' becomes 'ar' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'ar' put into 'bed' is 'BEARD'.

'has' is the link.

Can you help me to learn more?

(Other definitions for beard that I've seen before include "Facial growth" , "SECOND PART OF 14" , "Oppose with effrontery" , "Hair on the chin" , "hair extension" .)

I've seen this clue in the Evening Standard.
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