Like one end of a big bath (4)
I believe the answer is:
deep
This clue might be a double definition.
'like one' is the first definition.
Both the definition and answer are adjectives. Perhaps you can see an association between them that I don't see?
'end of a big bath' is the second definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I can't see?
Can you help me to learn more?
(Other definitions for deep that I've seen before include "Intense -- extreme" , "Cavernous" , "hard to follow" , "greatly involved?" , "down a long way" .)