Cryptically waste garment? (10)

I believe the answer is:

sweatpants

I'm a little stuck... Click here to teach me more about this clue!

'cryptically waste garment?' is the definition.
'sweatpants' can be an answer for 'garment?' (I've seen this before). I am not sure about the 'cryptically waste' bit.

'cryptically waste garment?' is the wordplay.
'cryptically' indicates an anagram.
'garment?' becomes 'pants' (pants is a kind of garment).
'waste' anagrammed gives 'sweat'.
'sweat'+'pants'='SWEATPANTS'

Can you help me to learn more?

(Other definitions for sweatpants that I've seen before include "Loose, warm garment - wasn't a pest (anag)" , "clothing" , "Joggers" , "Sports bags" .)

I've seen this clue in The Guardian.

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