Those we lost, foolishly, in the launderette? (6)

I believe the answer is:

towels

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'foolishly in the launderette?' is the definition.
I can't tell whether this defines the answer.

'those we lost' is the wordplay.
'we lost' anagrams to 'TOWELS'.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for towels that I've seen before include "Drying cloths for owlets" , "Absorbent cloths for owlets" , "Driers" .)

I've seen this clue in the Evening Standard.

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