NHS says a policy interfered with a shrink's work (14)
I believe the answer is:
psychoanalysis
'a shrink's work' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'nhs says a policy interfered with' is the wordplay.
'interfered with' indicates an anagram.
'nhs'+'says'+'a'+'policy'='nhssaysapolicy'
'nhssaysapolicy' with letters rearranged gives 'PSYCHOANALYSIS'.
Can you help me to learn more?
(Other definitions for psychoanalysis that I've seen before include "System of mental therapy" , "Freudian theory" , "Method of treatment pioneered by Freud" , "mental treatment" .)