Didn't lie down for a day, out of bed (3,2)
I believe the answer is:
sat up
'didn't lie down' is the definition.
I can't tell whether this definition defines the answer.
'day out of bed' is the wordplay.
'day' becomes 'sat' (abbreviation for Saturday).
'out of bed' becomes 'up' (synonyms).
'sat'+'up'='SAT UP'
'for a' acts as a link.
Can you help me to learn more?
(Another definition for sat up that I've seen is " Suddenly became alert".)
Want a hint initially instead of a full solution?
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