Crossword Genius

Do evening work at the laundry (4)

Ross

I believe the answer is:

iron

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

This might be a double definition.

'do evening work' is the first definition.
(to iron is to even out clothing)

'the laundry' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'at' acts as a link.

Can you help me to learn more?

(Other definitions for iron that I've seen before include "Former dividing line across Europe" , "Club; element" , "inflexible > club" , "Very robust" , "Flatten; element" .)

I've seen this clue in the Evening Standard.
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