Sponges cloakroom quickly, without finishing (6)

I believe the answer is:

loofas

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

'sponges' is the definition.
Although both the answer and definition are plural nouns, I don't see how they can define each other.

'cloakroom quickly without finishing' is the wordplay.
'cloakroom' becomes 'loo' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'quickly' becomes 'fast' (synonyms).
'without finishing' means to remove the last letter.
'fast' with its last letter taken away is 'fas'.
'loo'+'fas'='LOOFAS'

Can you help me to learn more?

(Another definition for loofas that I've seen is " Flesh-brushes".)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.