Face being sick in bed? (4,2)

I believe the answer is:

laid up

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

'sick in bed?' is the definition.
'laid up' can be an answer for 'sick' (I've seen this in another clue). I am not sure about the 'in bed?' bit.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for laid up that I've seen before include "Played a short golf shot" , "Stayed off-green" , "(Of ship) put in dock" , "Confined to bed by illness" , "bet on horse" .)

I've seen this clue in The Guardian.

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