Do evening work at the laundry (4)
I believe the answer is:
iron
This could 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 you can see an association between them that I don't see?
'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" .)