There are washing clothes in the tub. - MEANS - There are clothes being washed in the tub.
There is a washing man in the tub. - CAN IT MEAN - There is a man being washed in the tub.
There are washing clothes in the tub. - MEANS - There are clothes being washed in the tub.
There is a washing man in the tub. - CAN IT MEAN - There is a man being washed in the tub.
Based on this and your previous, almost identical question, it seems the root of your questioning is about whether a verb like 'washing' can go before the noun instead of after.
As I previously explained, when you put an -ing verb in front of the subject noun it usually becomes an adjective that describes the noun. In some cases, the adjective-noun combination may form a recognisable compound noun. As a verb it denotes the action they are performing:
Neither of your examples in this question are particularly idiomatic, for a couple of reasons.
First of all 'washing clothes' is just simply not said. Clothes don't wash themselves! So 'washing' wouldn't be ascribed to them as an adjective the same way it is to a 'washing machine' (also a compound noun), because that is a machine that washes.
A 'washing man' isn't really idiomatic either. It isn't incorrect - a man that is washing could, I suppose, be described as a 'washing man'. But it sounds like that's all he is - that 'washing' is a primary attribute of his. All you're really saying is that there is a man, he's in the tub, and what is he doing there - he's washing. Using it as a verb makes infinitely more sense.
The answer that you selected as correct on your previous question told you that the verb 'reading' was an adjective no matter which side of the noun it was on - that is just incorrect.