Psychiatrist's new, cooler chambers (4)
I believe the answer is:
jung
'psychiatrist's' is the definition.
(I have seen 'Swiss psychiatrist ' mean 'jung' so perhaps 'psychiatrist' could also mean 'jung')
'new cooler chambers' is the wordplay.
I cannot quite see how this works, but
'new' could be 'n' (common abbreviation eg NT for New Testament) and 'n' is present in the answer.
'cooler' could be 'jug' (I've seen this before) and 'jug' is present in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for jung that I've seen before include "Swiss psychoanalyst" , "Famous psychologist" , "Swiss psychiatrist" , "Swiss psychologist, 1875-1961" , "Carl --, psychoanalyst" .)