Snuggling up in cleanest lingerie (8)

I believe the answer is:

nestling

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'snuggling up' is the definition.
'nestling' can be an answer for 'snuggling' ('nestle' can be a synonym of 'snuggle'). I am not sure about the 'up' bit.

'in cleanest lingerie' is the wordplay.
'in' says the answer is hidden in the clue.
'NESTLING' is hidden within 'cleanest lingerie'.

Can you help me to learn more?

(Other definitions for nestling that I've seen before include "Little bird" , "Sitting snugly" , "in a huddle" , "Young bird - snuggling" , "getting under duvet?" .)

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