Need to rest during enraged rows, in essence (10)

I believe the answer is:

drowsiness

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'need to rest' is the definition.
I can't judge whether this defines the answer.

'during enraged rows in essence' is the wordplay.
'during' indicates the answer is hidden within the clue.
'DROWSINESS' is hidden in the letters of 'enraged rows in essence'.

Can you help me to learn more?

(Other definitions for drowsiness that I've seen before include "Dozy feeling" , "Lethargy, somnolence" .)

I've seen this clue in The Telegraph.

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