Having a predilection, I like being in bed (6)

I believe the answer is:

biased

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'having a predilection' is the definition.
I can't tell whether this defines the answer.

'i like being in bed' is the wordplay.
'like' becomes 'as'.
'being in' means one lot of letters goes inside another.
'i'+'as'='ias'
'ias' put inside 'bed' is 'BIASED'.

Can you help me to learn more?

(Other definitions for biased that I've seen before include "Prejudiced or partisan" , "Not impartial" , "Favouring one person or side over another" , "favouring a particular idea" , "'One-sided, slanted (6)'" .)

I've seen this clue in the Sydney Morning Herald.

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