Millions in bed over the festive period? (6)
I believe the answer is:
crimbo
'festive period?' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'millions in bed over' is the wordplay.
'millions' becomes 'm' (abbreviation).
'in' indicates putting letters inside.
'bed' becomes 'crib' (bed for a child).
'over' becomes 'o' (cricket abbreviation).
'm' going into 'crib' is 'crimb'.
'crimb'+'o'='CRIMBO'
'the' is the link.
Can you help me to learn more?
(Other definitions for crimbo that I've seen before include "December festival (informal)" , "Present day" .)