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 certain of the 'up' bit.

'in cleanest lingerie' is the wordplay.
'in' indicates a hidden word.
'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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