Almost intensified a part of the pool (4,3)
I believe the answer is:
deep end
'part of the pool' is the definition.
'deep end' can be an answer for 'part' (I have seen 'part of pool' mean 'deep end' so perhaps 'part' could also mean 'deep end'). I am not sure about the 'of the pool' bit.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for deep end that I've seen before include "Part of pool for diving" , "Where to find a diving board" , "Part of swimming pool" , "where one's helplessly thrown" , "difficult spot" .)