Get some rest, being terribly idle now (3,4)

I believe the answer is:

lie down

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'get some rest' is the definition.
I can't judge whether this definition defines the answer.

'terribly idle now' is the wordplay.
'terribly' is an anagram indicator.
'idle'+'now'='idlenow'
'idlenow' with letters rearranged gives 'LIE-DOWN'.

'being' acts as a link.

Can you help me to learn more?

(Other definitions for lie down that I've seen before include "Recline" , "Assume recumbent position" , "Take to one's bed" , "Become 14" , "joining rest" .)

I've seen this clue in The Times.

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