Keep receiving new adverts for protective legwear (4-4)

I believe the answer is:

knee-pads

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'protective legwear' is the definition.
I can't judge whether this definition defines the answer.

'keep receiving new adverts' is the wordplay.
'receiving' means one lot of letters goes inside another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'adverts' becomes 'ads' ('ad' can be a synonym of 'advert').
'keep' enclosing 'n' is 'kneep'.
'kneep'+'ads'='KNEE-PADS'

'for' acts as a link.

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I've seen this clue in The Times.

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