Cleaner unwilling to be subjugated by Lord casually (1-5)

I believe the answer is:

j-cloth

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

'cleaner' is the definition.
(I've seen this before)

'unwilling to be subjugated by lord casually' is the wordplay.
I cannot really understand how this works, but
'unwilling' could be 'loth' (similar in meaning) and 'loth' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Another definition for j-cloth that I've seen is " Common item used in household cleaning".)

I've seen this clue in The Telegraph.

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